Welcome to Combinatorics and Optimization

Spring 2018 Undergraduate Research Assistantship Program (URA)Applications for the Spring 2018 program are now closed.

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 is:

Sergey Norin - November 2

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

Grad Studies: Fall 2019 applications now open

 New Deadline: February 1, '19

  1. Jan. 16, 2019Sparse structures in graphs and matroids

    Professors Peter Nelson (PI) and Luke Postle (co-PI) have been awarded an International Research Partnership Grant (IPRG) for their project Sparse structures in graphs and matroids.

  2. Jan. 9, 2019Ronald C. Read (1924-2019)

    Former C&O faculty member Ronald (Ron) Read died on January 7, 2019 at the age of 94.

  3. Jan. 1, 2019Jane Gao joins the C&O department

    The C&O department is pleased to welcome our newest faculty member, Jane (Pu) Gao.

Read all news
  1. Feb. 26, 2019Reading Group on Entropy and Counting- John Schanck

    Title: Bounding Dedekind numbers with entropy

    Speaker: John Schanck
    Affiliation: University of Waterloo
    Room: MC 6486

    Abstract: The Dedekind numbers (sequence A000372 in the OEIS)

  2. Feb. 27, 2019Graphs and Matroids Seminar- Ahmed Ashraf

    Title: Cyclic flat approach to matroid base polytopes

    Speaker: Ahmed Ashraf
    Affiliation: Western University
    Room: MC 5501

    Abstract: Ardila, Benedetti and Doker realised matroid polytopes as generalized permutohedra, and using the work of Postnikov,

  3. Feb. 28, 2019Special Seminar - Yi-Shuai Niu

    Title: Difference-of-SOS and Difference-of-Convex-SOS Decomposition Techniques for Polynomials

    Speaker: Yi-Shuai Niu

    SJTU-Paristech & Maths department Shanghai Jiao Tong University

    Room: MC 5501


    We are interested in polynomial decomposition techniques for reformulating any multivariate polynomial into difference-of-sums-of-squares (DSOS) and difference-of-convex-sums-of-squares (DCSOS) polynomials.

All upcoming events