Tutte publications and events

Our researchers regularly share their findings and participate in public events to discuss their work.

This page presents listings of research papers authored or co-authored by Tutte employees, as well as past and upcoming events with Tutte participation.

Publications

Year 2019

A note on the depth-b normal elements

Date: December 2019

Host: arXiv

Authors: David Thomson, John Sheekey

Description: Read the abstract for A note on depth-b normal elements.

This paper has been presented at the 14th International Conference on Finite Fields and Applications.

An unsupervised framework for comparing graph embeddings

Date: November 2019

Host: Journal of Complex Networks

Authors: François Théberge, Bogumił Kamiński , Paweł Prałat

Description: Read the abstract for An unsupervised framework for comparing graph embeddings

This paper and portions from the paper have been presented at the International Conference on Complex Networks and their Applications and the Network Science Society's NetSci conference.

Clustering via Hypergraph Modularity

Date: November 2019

Host: PLOS ONE

Authors: Valérie Poulin, François Théberge, Bogumił Kamiński, Przemysław Szufel, Paweł Prałat

Description: Read the abstract for Clustering via Hypergraph Modularity.

This paper and portions from the paper have been presented at the Fields Institute for Research in Mathematical Sciences,Hypergraphs: Theory, Applications and Challenges (HyTAC) and NetSci.

The Zariski closure of integral points on varieties parametrizing periodic continued fractions

Date: October 2019

Host: arXiv

Authors: Bruce Jordan, Adam Logan, Yevgeny Zaytman

Description: Read the abstract for The Zariski closure of integral points on varieties parametrizing periodic continued fractions.

This paper and portions from the paper have been presented at the Quebec Maine Number Theory conference and the Applied Mathematics, Modelling and Computational Science (AMMCS) conference.

Topological methods for unsupervised learning

Date: August 2019

Host: SpringerLink

Authors: Leland McInnes

Description: Read the abstract for Topological methods for unsupervised learning.

This paper and portions from the paper have been presented at:

Uniform Manifold Approximation and Projection (UMAP) fact sheet

Finiteness results for K3 surfaces over arbitrary fields

Date: May 2019

Host: SpringerLink

Authors: Adam Logan, Martin Bright, Ronald van Luijk

Description: Read the abstract for Finiteness results for K3 surfaces over arbitrary fields.

Manifold learning of four-dimensional scanning transmission electron microscopy

Date: January 2019

Host: Nature Research’s Computational Materials

Authors: John Healy, Leland McInnes

Description: Read the abstract for Manifold learning of four-dimensional scanning transmission electron microscopy.

Portions from the paper have been presented at the National Research Council’s Natural Language Processing Group and PyData NYC.

Year 2018

Ensemble Clustering for Graphs

Date: December 2018

Host: SpringerLink

Authors: Valérie Poulin, François Théberge

Description: Read the abstract for Ensemble Clustering for Graphs.

This paper and portions from the paper have been presented at NetSci and the International Conference on Complex Networks and their Applications.

Ensemble Clustering for Graphs algorithm on Code Ocean

Dimensionality reduction for visualizing single-cell data using UMAP

Date: December 2018

Host: Nature Biotechnology

Authors: John Healy, Leland McInnes

Description: Read the abstract for Dimensionality reduction for visualizing single-cell data using UMAP.

This paper and portions from the paper have been presented at PyData LA and Machine Learning Prague.

Artin–Schreier extensions of normal bases

Date: September 2018

Host: ScienceDirect

Authors: Colin Weir, David Thomson

Description: Read the abstract for Artin-Schreier extensions of normal bases.

Comparing Graph Clusterings: Set partition measures vs. Graph-aware measures

Date: June 2018

Host: arXiv

Authors: Valérie Poulin, François Théberge

Description: Read the abstract for Comparing Graph Clusterings: Set partition measures vs. Graph-aware measures.

Connectivity in Hypergraphs

Date: June 2018

Host: Cambridge Core

Authors: Megan Dewar, John Proos, David Pike

Description: Read the abstract for Connectivity in Hypergraphs.

Portions from the paper have been presented at the Canadian Mathematical Society (CMS) winter meeting.

Year 2017

The de Rham cohomology of the Suzuki curves

Date: October 2017

Host: American Mathematical Society

Authors: Colin Weir, Beth Malmskog, Rachel Pries

Description:

Read the abstract for The de Rham cohomology of the Suzuki curve

This paper has been presented at the 16th International Conference on Arithmetic, Geometry, Cryptography, and Coding Theory.

Accelerated Hierarchical Density Clustering

Date: May 2017

Host: arXiv

Authors: Leland McInnes, John Healy

Description: Read the abstract for Accelerated Hierarchical Density Clustering

Portions from the paper have been presented at PyData NYC.

Events - 2019

December 2019

West Coast Number Theory 2019

Date: December 16-20, 2019

Category: Conference support

Description: As in previous years, TIMC is providing financial assistance to the West Coast Number Theory (WCNT) Conference. In its 50th year, WCNT is returning to its roots at Asilomar, California. One of the longest standing conferences in number theory, WCNT is a uniquely collaborative meeting where participants present results, pose problems, and team up to tackle open questions in number theory. Two TIMC researchers are co-organizing the meeting.

West Coast Number Theory home page.

Complex Networks 2019

Date: December 10-12, 2019

Category: Presentations

Description: The Complex Networks meeting aims to bring together researchers from different scientific communities working on areas related to complex networks. Two types of contributions are welcome: theoretical developments arising from practical problems, and case studies where methodologies are applied.

Dr. François Théberge will be presenting a poster entitled "A framework for comparing graph embeddings" which is joint work with Dr. Bogumił Kamiński (Warsaw School of Economics) and Dr. Paweł Prałat (Ryerson University), at the 8th International Conference on Complex Networks and their Applications. In addition, he will be giving a presentation of joint work with Valérie Poulin and Drs. Bogumił Kamiński, Bartosz Pankratz, Przemysław Szufel (Warsaw School of Economics) and Dr. Pawel Prałat (Ryerson University) on "Clustering via Hypergraph Modularity".

Complex Networks 2019: The 8th International Conference on Complex Networks and their Applications.

Canadian Mathematical Society winter meeting 2019

Date: December 6-9, 2019

Category: External events

Description: Drs. Leland McInnes and Colin Weir, along with colleague Dr. Kristine Bauer (University of Calgary), organized a session on Topological Data Analysis (TDA) at the Canadian Mathematical Society winter meeting. Nine speakers from across Canada and the United States spoke on pure and applied aspects of TDA, exposing the wider Canadian mathematics committee to the subject. Further to that end, Dr. McInnes presented a mini-course introduction to the subject prior to the session.

TIMC believes in contributing to the health of the wider Canadian mathematics community. Dr. Megan Dewar sits on the CMS Board of Directors as a member for Ontario, as well as holding a position on the CMS Nominating Committee.

Canadian Mathematical Society (CMS) winter meeting 2019.

November 2019

University of Ottawa Math Club

Date: November 28, 2019

Category: Presentations

Description: Dr. David Thomson gave a presentation to the University of Ottawa Math Club on “An Overview of Modern Cryptography”.

The talk began with a discussion of Order of Canada recipient and wartime cryptographer Dr. William Tutte – the namesake of TIMC – before proceeding into mid-century modern cryptographic topics. Wide-scale mobile and internet communications are used to motivate public key cryptography, using Diffie-Hellman-Merkle key exchange and Rivest-Shamir-Adleman public key encryption schemes as examples.

The transition to post-modernism continues, where the “quantum-threat” to cryptography is used to show the necessity of an impending transition to Post-Quantum Cryptography.

GeekWeek

Date: November 14-22, 2019

Category: External events

Description: GeekWeek is an annual workshop run by the Canadian Centre for Cyber Security that brings together key players in the field of cyber security for nine days of intensive research and development. Tech enthusiasts are presented with the necessary time and resources to devise and implement innovative solutions to prevent, analyze or mitigate cyber-attacks. GeekWeek offers a unique environment for participants to transform the craziest ideas into reality: advanced tools, millions of samples of spam emails, malware, and analysis reports available for testing, and of course, access to other cyber experts.

Carrying on a tradition of past years, John Healy led a support group -- consisting of several TIMC and CSE data scientists -- tasked with providing participants with the tools and skills necessary to analyze the data they were working with. In addition, this year John co-led a team focussing on applying TIMC-developed data science techniques to the problem of analyzing actors attacking honey-pots on the deep web.

Rapid Response Mechanism (RRM) Canada hackathon

Date: November 4-13, 2019

Category: TIMC events

Description: CSE and GAC’s Rapid Response Mechanism (RRM) Canada hosted an international “hackathon” to test and improve tools aimed at detecting potential foreign interference campaigns in online spaces.

The hackathon built upon results developed at TIMC’s STAMP workshop (hosted in May 2019). For this past year’s STAMP, TIMC collaborated with RRM Canada in challenging STAMP participants to develop tools aimed at detecting foreign interference campaigns on fringe platforms – where they often originate but are difficult to monitor – before they move to mainstream platforms.

The hackathon provided an opportunity for technical experts from the Government of Canada, G7, academia and civil society to test the analytical tools developed at STAMP by analyzing data related to the 2019 Canadian federal election in retrospect. Although no foreign interference campaigns were detected during the hackathon, a number of these tools were tested and improved.

The hackathon also provided a platform to engage in robust discussions about open social media research and analysis, apply knowledge to real case studies, share methods and best practices and, perhaps most critically, strengthen the international community of practice on open source social media analytics.

Hypergraphs:  Theory, Applications and Challenges

Date: November 4-8, 2019

Category: Presentations

Description: Dr. François Thébergepresented two invited talks at Hypergraphs:  Theory, Applications and Challenges (HyTAC):  "Graph Embeddings" and "Introduction to Hypergraph Clustering"

Group dynamics can often be better modeled through hypergraphs, which are a generalization of graphs. However, there are not yet scalable systems to support hypergraph computation, and several challenges and opportunities arise in their design and implementation. As the title suggests, the goal of the HyTAC workshop is to contribute to the development of hypergraph theory, design and application through bringing together members of the hypergraph research community from all over the world.

Hypergraphs: Theory, Applications and Challenges 2019.

PyData LA

Date: November 4-6, 2019

Category: Presentations

Description: Two TIMC researchers gave talks at PyData LA: Dr. Leland McInnes presented “Learning Topology: Topological Techniques for Unsupervised Learning and John Healy presented “MAP all the things.

PyData Los Angeles 2019.

October 2019

Carleton University

Date: October 10, 2019

Category: Presentations

Description: Dr. Megan Dewar gave a talk about her career experience -- and TIMC more broadly -- to a seminar for undergraduate and graduate students at Carleton University.

Québec-Maine Number Theory Conference

Date: October 5-6, 2019

Category: Presentations

Description: The Québec-Maine Number Theory Conference is an annual meeting that alternates between Laval University and the University of Maine and attracts many number theorists from eastern Canada, New England, and beyond.

Dr. Adam Logan contributed a talk (abstract available) entitled "Integral points on continued fraction varieties".

2019 Maine/Québec Number Theory Conference.

September 2019

PyData Montreal

Date: September 25, 2019

Category: Presentations

Description: Dr. Leland McInnes gave an invited talk at the PyData Montreal Meetup #7 on "Learning Topology: Topological Techniques for Unsupervised Learning".

PyData Montreal 2019.

Central European Number Theory Conference

Date: September 1-6, 2019

Category: Presentations

Description: Dr. Gary Walsh gave an invited talk on “Categorizing elliptic curves with rational two torsion containing a primitive integer point” at the Central European Number Theory (CENT) Conference. This conference is the successor of the traditional Czech and Slovak International Conference on Number Theory (NTC) which has been organized since 1972.

24th Central European Number Theory Conference.

August 2019

Geometric Science of Information conference 2019

Date: August 27-29, 2019

Category: Presentations

Description: The Geometric Science of Information (GSI) conference brings together mathematicians and statisticians modelling information via geometry and topology. Dr. Leland McInnes presented on his paper "Topological Methods for Unsupervised Learning" about the use of topological and category theoretic approaches to the construction of unsupervised learning algorithms.

4th conference on Geometric Science of Information.

Fields Institute summer school on complex networks

Date: August 19-23, 2019

Category: External events

Description: Dr. François Théberge, along with co-presenters Dr. Pawel Pralat, Dr. Bogumil Kaminski and Dr. Przemyslaw Szufel are presenting a week-long summer school on representing and analyzing relational data at the Fields Institute for Research in Mathematical Sciences.

In a relational data set, an observation involves two or more entities. Such data sets are often modeled via graphs or hypergraphs. A graph is a collection of vertices representing the entities, connected via edges, each of which represents a relationship between two vertices. Hypergraphs are used to model relations involving an arbitrary number of entities. Exploratory data analysis over relational data can be challenging. Slicing or sampling a relational data set tends to destroy its structure and not much can be learned from it. The missing or noisy data problem is also more problematic with relational data. For example, the addition or removal of an edge in a graph can considerably change properties such as the diameter.

The course will explore various theoretical and practical aspects of relational data representation and mining. The format of the course will be a mix of lectures and demonstrations of various techniques over relational datasets using Python, Julia and Jupyter Notebooks.

Fields Institute - Summer school on data science tools and techniques in modelling complex networks.

Applied Mathematics, Modelling and Computation Sciences (AMMCS) conference

Date: August 19-23, 2019

Category: Presentations

Description: Applied Mathematics, Modelling and Computational Science (AMMCS) is an interdisciplinary conference, held every two years at Wilfrid Laurier University, that features sessions in a wide range of areas in pure and applied mathematics. Two TIMC researchers, Drs. Gary Walsh and Adam Logan, were invited to speak in the Computational Number Theory session. They presented on "Categorizing Elliptic Curves with Rational 2-Torsion in Terms of the Existence of Integer Points" and "Integral points on continued fraction varieties".

The Applied Mathematics, Modelling and Computation Sciences (AMMCS) International Conference

July 2019

Scientific Computing with Python (SciPy) 2019

Date: July 8-14, 2019

Category: Conference support, External events

Description: TIMC was a Silver level sponsor of the 18th annual Scientific Computing with Python (SciPy) conference, held in Austin, Texas from July 8 - 14, 2019. SciPy brings together over 800 participants from industry, academia, and government to showcase their latest projects, learn from skilled users and developers, and collaborate on code development.

The Data-Driven Discoveries track of the SciPy 2019 conference was co-chaired by Tutte Institute researchers Dr. Leland McInnes and Reshama Shaikh. They had the challenging task of narrowing down the almost 60 submissions from leading scientists and researchers into a selection of 20 talks for the conference. While the selections were difficult, the end result ‑‑ as evidenced by the final program ‑‑ was an exceptional series of talks.

Scientific Computing with Python (SciPy) 2019.

Canadian Mathematical Society summer meeting 2019

Date: July 7-10, 2019

Category: Conference support

Description: Dr. Megan Dewar was an invited speaker in the mini-course on Building Your Career in Mathematics. Dr. Dewar spoke about what it is like working at a government research institute and what graduate students might think about when considering such a career. She also spoke about some of the research recently produced by TIMC.

TIMC believes in contributing to the health of the wider Canadian mathematics community. Dr. Megan Dewar sits on the CMS Board of Directors as a member for Ontario, as well as holding a position on the CMS Nominating Committee.

2019 Canadian Mathematical Society summer meeting.

The 14th International Conference on Finite Fields and their Applications

Date: June 3-7, 2019

Category: Conference support

Description: TIMC supported the 14th International Conference on Finite Fields and their Applications (Fq14) which was held from June 3-7, 2019 in Vancouver, BC.

This biannual conference series began in 1991 and has become the foremost finite fields conference worldwide in both reputation and size. The principal topics of interest of the Fq conference series are theoretical, computational, and application-driven. Theoretical topics include the structure of finite fields, primitive elements, normal bases, polynomials, number‑theoretic aspects of finite fields, character sums, function fields, and almost perfect nonlinear functions.

Computational topics include algorithms and complexity, polynomial factorization, decomposition and irreducibility testing, and sequences and functions. Application-driven topics include algebraic coding theory, cryptography, algebraic geometry over finite fields, finite incidence geometry, designs, combinatorics, and quantum information science.

May 2019

Annual Tutte lecture: Dr. Lorena Barba

Date: May 29, 2019

Category: TIMC events

Description: The Tutte Lecture, hosted annually in celebration of Dr. William Tutte’s birthday (May 14), is given by a distinguished mathematician to a broad CSE audience. This year’s lecture was given by Dr. Lorena Barba, Professor of Mechanical and Aerospace Engineering at the George Washington University.

Title: Next in reproducibility: standards, policies, infrastructure, and human factors

Abstract: The National Academies of Science, Engineering and Medicine released a consensus study report on “Reproducibility and Replicability in Science” on May 7, 2019. The report provides definitions of reproducibility and replicability accounting for the diversity of fields in science and engineering. It assesses the state of reproducibility and replicability across science, and it offers recommendations for researchers, agencies, policy makers, journals, professional societies, and more. In its definitions, the committee emphasized the ubiquity and importance of computing and the data-intensive processes in modern science. Reproducibility was defined as obtaining consistent computational results using the same input data, computational steps, methods, code, and conditions of analysis as an original study.

Although this may sound straightforward, the report describes how a number of systematic efforts to reproduce computational results have failed in more than half of the attempts made, mainly due to insufficient detail on digital artifacts, such as data, code and computational workflow. In the wake of this comprehensive report, what is next for reproducibility?

Biography: Lorena A. Barba is an international leader in computational science and engineering and a long-standing advocate of open source software for science and education. Dr. Barba is chair of the Board of Directors for NumFOCUS, a charity in the United States that supports and promotes world-class, innovative, open-source scientific software. She is also an expert in research reproducibility, and was a member of the National Academies study committee on Reproducibility and Replicability in Science, which released its report in May 2019.

Tutte lecture co-hosted with Shopify

Date: May 28, 2019

Category: TIMC events

Description: This lecture was given by Dr. Lorena Barba, Professor of Mechanical and Aerospace Engineering at the George Washington University.

Title: One step forward, two steps back: the frustration of diversity efforts in STEM

Abstract: Two years ago, a Google engineer attended a diversity program. He had such an adverse reaction to it, that he proceeded to write a 10-page anti-diversity manifesto that he circulated on internal channels. It later became public, furor ensued, and the engineer was fired.

Far from being the end of the story, this engineer played the victim of political correctness and became a darling of conservative media outlets. What happened here? One tech company’s attempts to educate its employees and improve the internal culture mightily backfired and as a result the cause for women in STEM was choked back. While a general sense that moving toward gender parity is desirable (though some still disagree with this premise), what actions to take remains unclear.

Diversity training programs have been scarcely evaluated, and when they have, they seem to change awareness but not behavior. Sometimes, they create a backlash. More assertive action, like quotas, engender open resentment. Women in science and technology are underestimated by peers and teachers, pressed by stereotypes, disadvantaged in hiring and career progression, sexually harassed, disheartened as their expertise is ignored…and now they are resented for diversity initiatives.

Science and technology needs its leaders to be fully committed to diversity and in full understanding of the social-justice underpinnings. Two vehicles for change are: male leaders who are allies and more women in leadership. The recent DataCamp debacle shows that a whole community’s action was needed to right the wrongs of one harasser and one company’s reticence to make him accountable. I aim to elicit your commitments to hire and promote women affirmatively, and to get educated and empower activism with evidence.

Biography: Lorena A. Barba is an international leader in computational science and engineering and a long-standing advocate of open source software for science and education. Dr. Barba is chair of the Board of Directors for NumFOCUS, a charity in the United States that supports and promotes world-class, innovative, open-source scientific software. She is also an expert in research reproducibility, and was a member of the National Academies study committee on Reproducibility and Replicability in Science, which released its report in May 2019.

National Science Foundation-Conference Board of the Mathematical Sciences (NSF-CBMS) conference

Date: May 18, 2019

Category: External events

Description: Dr. Leland McInnes attended the software day and ran a code sprint at the National Science Foundation-Conference Board of the Mathematical Sciences (NSF-CBMS) Conference and Software Day on Topological Methods in Machine Learning and Artificial Intelligence in Charleston, South Carolina.

National Science Foundation-Conference Board of the Mathematical Sciences (NSF-CBMS) conference and software day on topological methods in machine learning and artificial intelligence.

University of Western Ontario workshop

Date: May 2-5, 2019

Category: Conference support

Description: TIMC provided funding to the University of Western Ontario for a workshop on Topological Data Analysis, with Applications organized by Dr. Rick Jardine and Dr. Matt Davison. Topological data analysis is an area of great interest to TIMC researchers, and we have a wish to see more developments in this field as well as encourage new researchers to join the effort. Dr. Leland McInnes was an invited speaker at the workshop, presenting a talk on Using Topological Data Analysis for Unsupervised Learning.

National Science Foundation-Conference Board of the Mathematical Sciences (NSF-CBMS) conference and software day on topological methods in machine learning and artificial intelligence.

March 2019

University of Waterloo seminar

Date: March 21, 2019

Category: Presentations

Description: Dr. Leland McInnes was an invited speaker at the University of Waterloo’s Computational Mathematics Seminar.  He discussed bringing topological and category theoretic tools to bear on computational problems in machine learning.

University of Waterloo colloquiums and joint seminars.

February 2019

Machine Learning Prague

Date: February 22-24, 2019

Category: Presentations

Description: Dr. Leland McInnes was an invited speaker at Machine Learning Prague 2019. Leland’s talk was on topological approaches to unsupervised learning; discussing both the UMAP algorithm for dimension reduction, and how such techniques can be extended to other problems including metric learning, word embedding, clustering and even anomaly detection.

Machine Learning Prague 2019.

January 2019

Simons Collaboration on Arithmetic Geometry, Number Theory, and Computation annual meeting

Date: January 10-11, 2019

Category: Presentations

Description: Dr. Adam Logan was invited to the annual meeting of the Simons Collaboration on Arithmetic Geometry, Number Theory and Computation. The meeting was attended by many of the leading North American researchers in these fields.

This collaboration is the framework in which the Simons Foundation sponsors researchers and conferences, promotes collaboration, and supports access to extensive databases of mathematical objects arising in these fields. It has already had a substantial impact on the landscape of research and is expected to continue to do so. TIMC intends to continue its engagement with the Simons Collaboration in the future.

Simons collaboration on arithmetic geometry, number theory, and computation annual meeting.

Events - 2018

December 2018

West Coast Number Theory 2018

Date: December 15-19, 2018

Category: Conference support

Description: As in previous years, TIMC is providing financial assistance to the West Coast Number Theory (WCNT) conference.  In its 49th year, WCNT is one of the longest standing conferences in number theory.  It is a uniquely collaborative meeting where participants present results, pose problems, and team up to tackle open questions in number theory.  Two TIMC researchers are co-organizing the meeting.

West Coast Number Theory 2018 schedule of talks.

Complex Networks 2018

Date: December 11-13, 2018

Category: Presentations

Description: François Théberge will be presenting joint work with Valerie Poulin on two separate topics: (1) “Comparing Graph Clusterings: Set partition measures vs. Graph-aware measures” and (2) “Ensemble Clustering for Graphs” at the 7th International Conference on Complex Networks and their Applications.  Both works will also appear in conference proceedings publications.

The Complex Networks meeting aims to bring together researchers from different scientific communities working on areas related to complex networks. Two types of contributions are welcome: theoretical developments arising from practical problems, and case studies where methodologies are applied. Both contributions are aimed at stimulating the interaction between theoreticians and practitioners.

Canadian Mathematical Society (CMS) winter meeting 2018

Date: December 7-10, 2018

Category: External events

Description: Dr. Megan Dewar co-organized a scientific session on Discrete Math in Communications and Computation.  She gave a presentation in the session entitled “Connectivity in Hypergraphs”.  The session includes a diversity of speakers from academia and industry from across Canada.

TIMC believes in contributing to the health of the wider Canadian mathematics community.  Dr. Megan Dewar and Dr. Gary Walsh both sit on the CMS Board of Directors as Members for Ontario.

October 2018

GeekWeek

Date: October 18-26, 2018

Category: External events

Description: GeekWeek is an annual workshop that brings together key players in the field of cyber security for nine days of intensive research and development. Tech enthusiasts are presented with the necessary time and resources to devise and implement innovative solutions to prevent, analyze or mitigate cyber-attacks. 

John Healy led a support group ‑‑ consisting of several TIMC and CSE data scientists ‑‑ tasked with providing participants with the tools and skills necessary to analyze the data they were working with.  The team relied heavily on the TIMC implementation of HDBSCAN for clustering and their recently developed UMAP technique for dimension reduction.

GeekWeek blog – October 2018

PyData NYC

Date: October 17-19, 2018

Category:

Presentations

Description: TIMC’s presence at PyData NYC 2018 was strong. Two researchers gave talks: Dr. Leland McInnes presented “A Bluffer’s Guide to Dimension Reduction” and John Healy presented “HDBSCAN, fast density based clustering, the how and the why.” Two other researchers – Dr Amy Wooding and Dr Kjell Wooding – gave a tutorial on Reproducible Data Science entitled “Up your bus number: A reproducible Data Science Workflow.”

PyData New York City 2018

Natural Language Processing Group at NRC

Date: October 12, 2018

Category: Presentations

Description: John Healy was invited to give a talk on “Word Embeddings” to the Natural Language Processing Group at the National Research Council.  John’s talk compared various word embedding algorithms, including word2vec, GloVe and FastText, as well as the work that TIMC has been doing in applying the dimension reduction techniques employed by UMAP to words.

September 2018

The Fields Institute for Research in Mathematical Sciences: Commercial and Industrial Mathematics Program

Date: September 13, 2018

Category: Presentations

Description: Dr. Leland McInnes has been invited by the Commercial and Industrial Mathematics Program to give a talk on Topological Methods for Unsupervised Learning. Leland’s talk will describe his very popular UMAP (LINK ONCE NEW PAGE IS BUILT), and how theory can be extended to other unsupervised learning problems including clustering and anomaly detection.

Fields Institute – Talk on Topological methods for unsupervised learning

July 2018

Oberwolfach Research Institute for Mathematics workshop

Date: July 29-August 4, 2018

Category: Presentations

Description: Adam Logan was invited to participate in the Oberwolfach Research Institute for Mathematics Workshop on Explicit Methods in Algebraic Number Theory.  While there he presented a talk on “Three modular fivefolds of level 8.”

The Oberwolfach Research Institute for Mathematics is an international research centre situated in the German Black Forest. Leading experts from all over the world meet at the Institute in order to pursue their research activities, to discuss recent developments in their field with others, and to generate new ideas.

Oberwolfach Research Institute for Mathematics workshop on Explicit methods in number theory.

Scientific Computing with Python (SciPy) 2018

Date: July 9-15, 2018

Category: External events, Presentations

Description: At this year’s SciPy 2018 conference (Scientific Computing with Python) the Machine Learning session was co-chaired by Tutte Institute researcher Dr. Leland McInnes, and Dr. Michelle Gill of BenevolentAI.

The Machine Learning track at SciPy received 31 excellent submissions, and selecting the best of those submissions was a challenging task. The end result was an extremely strong and well attended series of talks for this year’s SciPy.

Dr. Leland McInnes presented a talk at the SciPy 2018 Conference (Scientific Computing with Python) which was held in Austin, Texas from July 9 – 15.   The talk, entitled UMAP: Uniform Manifold Approximation and Projection for Dimension Reduction, introduced the audience to a new approach to dimension reduction called UMAP. UMAP is grounded in manifold learning and topology, making an effort to preserve the topological structure of the data.

SciPy 2018 presentation on YouTube.

Uniform Manifold Approximation and Projection (UMAP) fact sheet (LINK ONCE PAGE IS BUILT)

Canadian Number Theory Association Conference

Date: July 9-13, 2018

Category: Conference support

Description: The Tutte Institute for Mathematics and Computing (TIMC) is providing funding to the Canadian Number Theory Association (CNTA) for its 15th conference in Quebec City, Quebec, at Laval University.

The CNTA was founded in 1987 for the purpose of enhancing and promoting learning and research in number theory, particularly in Canada.

Canadian Number Theory Association conference 2018.

June 2018

PyData Ann Arbor

Date: June 12, 2018

Category: Presentations

Description: Dr. Leland McInnes will be giving an invited talk on PCA, t-SNE, and UMAP: modern Approaches to Dimension Reduction.

PyData Ann Arbor.

The Field Institute for Research in Mathematical Sciences: Commercial and Industrial Mathematics Program

Date: June 4, 2018

Category: Presentations

Description: Dr. François Théberge has been invited by the Commercial and Industrial Mathematics Program to give a talk on Hypergraph Modularity and Clustering.

Fields Institute - Talk on Hypergraph modularity and clustering.

Canadian Mathematical Society Summer Meeting 2018

Date: June 1-4, 2018

Category: Presentations

Description: Dr. Gary Walsh is co-organizing a session on Computational and Diophantine Number Theory and Dr. Colin Weir is giving a talk titled Diophantine equations counting supersingular hyperelliptic curves.

Canadian Mathematical Society summer meeting 2018.

May 2018

Annual Tutte lecture : Dr. Kristin Lauter

Date: May 17, 2018

Category: TIMC events

Description: The Tutte Lecture, hosted annually in celebration of Dr. William Tutte’s birthday (May 14), is given by a distinguished mathematician to a broad CSE audience. This year’s lecture was given by Dr. Kristin Lauter, Principal Researcher and Research Manager for the Cryptography Group at Microsoft Research.

Abstract: This talk will describe a mathematical solution for securely handling outsourced computation in the cloud, using homomorphic encryption.  One application is to provide private storage and computation on genomic data, to protect the long-term privacy of the data.  Many other applications in the health, financial, and public sectors can make use of homomorphic encryption techniques to securely and privately store and compute on encrypted data.  Current solutions for Homomorphic Encryption are based on hard problems in number theory related to lattices.  This talk will survey the theory and practice of homomorphic encryption today.

Biography: Dr. Kristin Lauter is Principal Researcher and Research Manager for the Cryptography group at Microsoft Research.  Her research areas are number theory and algebraic geometry, with applications to cryptography.  She is particularly well known for her work on homomorphic encryption and elliptic curve cryptography.

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