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Welcome to Combinatorics and Optimization

Winter 2020 Undergraduate Research Assistantship (URA) Opportunities.

Spring 2020 Undergraduate Research Assistantship Program (URA). ***ON-LINE APPICATIONS OPEN November 1, 2019.***


Tutte's Distinguished Lecture Series 

The very successful Tutte's 100th Distinguished Lecture Series has now completed. That success has led to a Tutte Distinguished Lecture once per term. The next lecture will happen in the Spring term.

*Recordings of occurred talks are all available on C&O's YouTube Channel   


Grad Studies: Fall 2020 applications now open

 New Deadline: February 1, '20


  1. July 1, 2020C&O welcomes four new faculty members

    The C&O department is very pleased to welcome four new faculty members, Assistant Professors Logan Crew, Stephen Melczer, Oliver Pechenik and Sophie Spirkl.

  2. June 30, 2020Jun Yan awarded an Alumni Gold Medal
    Jun Yan

    At the Spring convocation, Jun Yan was awarded an Alumni Gold Medal in recognition of his academic excellence during his undergraduate studies in Combinatorics & Optimization and Pure Mathematics. Jun Yan was also a recipient of the 2020 William Tutte Centenary Scholarship. 

  3. June 27, 2020Jochen Koenemann to begin a two-year term as department chair
    Jochen Koenemann

    On July 1, 2020, Professor Jochen Koenemann begins a two-year term as chair of the Combinatorics and Optimization (C&O) department.

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  1. July 10, 2020Tutte Colloquium - Felix Leditzky

    Title: Number-theoretic methods in quantum computing

    Speaker: Felix Leditzky
    Affiliation: University of Waterloo
    Zoom: Please email Emma Watson

    Abstract:

    Quantum teleportation is one of the fundamental building blocks of quantum Shannon theory. The original teleportation protocol is an exact protocol and amazingly simple, but it requires a non-trivial correction operation to make it work. Port-based teleportation (PBT) is an approximate variant of teleportation with a simple correction operation that renders the protocol unitarily covariant.

  2. July 13, 2020Algebraic Graph Theory Seminar - Sebastian Cioaba

    Title: On the flip graph on perfect matchings of complete graphs and sign reversal graphs

    Speaker: Sebastian Cioaba
    Affiliation: University of Delaware
    Zoom: Contact Soffia Arnadottir

    Abstract:

    In this talk, we study the flip graph on the perfect matchings of a complete graph of even order. We investigate its combinatorial and spectral properties including connections to the signed reversal graph and we improve a previous upper bound on its chromatic number.

  3. July 16, 2020Algebraic Combinatorics Seminar - Oliver Pechenik

    Title: Dynamics of plane partitions

    Speaker: Oliver Pechenik
    Affiliation: University of Waterloo
    Zoom: Contact Karen Yeats

    Abstract:

    Consider a plane partition P in an a X b X c box. The rowmotion operator sends P to the plane partition generated by the minimal elements of its complement. We show rowmotion resonates with frequency a+b+c-1, in the sense that each orbit size shares a prime divisor with a+b+c-1. This confirms a 1995 conjecture of Peter Cameron and Dmitri Fon-Der-Flaass. (Based on joint works with Kevin Dilks & Jessica Striker and with Becky Patrias.)

All upcoming events