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Please note: The University of Waterloo is closed for all events until further notice.

Thursday, March 31, 2016 — 4:00 PM EDT

Title: Presenting a tangle

Thursday, March 31, 2016 — 3:00 PM EDT

Title: Arc-transtive cubic graphs

Speaker: | Krystal Guo |

Affiliation: | University of Waterloo |

Room: | MC 6486 |

Abstract: We will look at a classical result of Tutte in his seminal paper "A Family of Cubic Graphs"; every cubic arc-transitive graph is s-arc-regular for some s between 1 and 5.

Thursday, March 31, 2016 — 3:00 PM EDT

Title: Arc-transtive cubic graphs

Speaker: | Krystal Guo |

Affiliation: | University of Waterloo |

Room: | MC 6486 |

Abstract: We will look at a classical result of Tutte in his seminal paper "A Family of Cubic Graphs"; every cubic arc-transitive graph is s-arc-regular for some s between 1 and 5.

Thursday, March 24, 2016 — 2:00 PM EDT

Title: Representation stability for the cohomology of arrangements

Tuesday, March 22, 2016 — 4:15 PM EDT

Title: Gallai's path decomposition conjecture

Monday, March 21, 2016 — 4:30 PM EDT

Title: The mathematics of juggling

Speaker: | Gabriel Gauthier-Shalom |

Affiliation: | University of Waterloo |

Room: | MC 6486 |

Abstract: Siteswap is a mathematical notation for juggling patterns that is

natural, simple, and useful in practice. I will be presenting an overview of

this topic and its connections with other areas of mathematics. There will be demonstrations!

Friday, March 18, 2016 — 3:30 PM EDT

Title: Recognizing frame matroids

Thursday, March 17, 2016 — 4:00 PM EDT

Title: The matroid secretary problem for minor-closed classes

Thursday, March 17, 2016 — 2:00 PM EDT

Title: McMullen's proof of the g-theorem for polytonal spheres

Monday, March 14, 2016 — 4:30 PM EDT

Title: Principal angles and vectors of two subspaces

Friday, March 11, 2016 — 3:30 PM EST

Title: Graphs are to matroids as embedded graphs are to what?

Thursday, March 10, 2016 — 4:30 PM EST

Title: The replication conjecture II

Thursday, March 10, 2016 — 3:00 PM EST

Title: Strongly regular subconstituents of strongly regular graphs

Thursday, March 10, 2016 — 2:00 PM EST

Title: Hopf algebras, colorings and simplicial complexes

Monday, March 7, 2016 — 4:30 PM EST

Title: The perfect matching polytope and solid graphs

Friday, March 4, 2016 — 3:30 PM EST

Title: On some polytopes contained in the 0,1 hypercube that have a small

chvatal rank

Thursday, March 3, 2016 — 4:00 PM EST

Title: A unified Erd\H os-P\'osa theorem for constrained cycles

Thursday, March 3, 2016 — 3:00 PM EST

Title: Introduction to association schemes

Speaker: | Krystal Guo |

Affiliation: | University of Waterloo |

Room: | MC 6486 |

Abstract: The theory of association schemes is an important toolbox for algebraic graph theory. We will give an introduction to association scheme, distance regular graphs and the clique-coclique bound.

Friday, February 26, 2016 — 3:30 PM EST

Title: My favorite number

Speaker: | John Baez |

Affiliation: | University of California, Riverside |

Room: | DC 1302 |

Abstract: The number 24 plays a central role in mathematics thanks to a series of "coincidences" that is just beginning to be understood. One of the first hints of this fact was Euler's bizarre "proof" that

1\^ + 2\^ + 3\^ + 4\^ + … = -1/12\^

Thursday, February 25, 2016 — 4:30 PM EST

Title: The Replication Conjecture

Speaker: | Ahmad Abdi |

Affiliation: | University of Waterloo |

Room: | MC 5417 |

Abstract: In 1972, Lovasz proved a key lemma that was the piece of the puzzle Fulkerson missed to prove the weak perfect graph theorem. This important lemma, called the Duplication Lemma, simply states that vertex duplication preserves graph perfection.

Thursday, February 18, 2016 — 4:00 PM EST

Title: Matroid perspectives and graph polynomials

Thursday, February 11, 2016 — 4:30 PM EST

Title: Claw decompositions of random 4-regular graphs

Thursday, February 11, 2016 — 3:30 PM EST

Title: Quantum walks and graph embeddings

Wednesday, February 10, 2016 — 9:00 AM EST

Title: Trees, chord diagrams and the renormalization group equation

Speaker: | Karen Yeats |

Affiliation: | Simon Fraser University |

Room: | MC 5417 |

Abstract: How far can we get in understanding perturbative expansions in quantum field theory combinatorially?

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University of Waterloo

University of Waterloo

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The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Indigenous Initiatives Office.