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Friday, June 15, 2018 3:30 pm - 3:30 pm EDT (GMT -04:00)

Tutte Colloquium - Marthe Bonamy

Title:ÌýDistributed coloring in planar graphs

Speaker: Marthe Bonamy
Affiliation: University of Bordeaux
Room: MC 5501

Abstract:

We are concerned with efficiently coloring sparse graphs in the distributed setting with as few colors as possible. According to the celebrated Four Color Theorem, planar graphs can be colored with at most 4 colors, and the proof gives a (sequential) quadratic algorithm finding such a coloring.

Tuesday, June 19, 2018 3:00 pm - 3:00 pm EDT (GMT -04:00)

Special Seminar - Courtney Paquette

Title:ÌýMinimization of convex compositions

Speaker: Courtney Paquette
Affiliation: LehighÌýUniversity
Room: MC 6486

Abstract:

Numerous optimization tasks can be posed as minimization of a finite convex function composed with a smooth map. Phase retrieval andÌýmatrix factorization problems are commonÌýexamples.

Thursday, June 21, 2018 3:30 pm - 3:30 pm EDT (GMT -04:00)

Graphs and Matroids Seminar

Title:ÌýThe price of connectivity for domination

Speaker: Paul Ouvrard
Affiliation: University of Bordeaux
Room: MC 5479

Abstract:ÌýThe price of connectivity for dominating set in a graph G is the ratio between the minimum sizes of a connected dominating set and a dominating set of G.

Thursday, June 28, 2018 11:30 am - 11:30 am EDT (GMT -04:00)

Algebraic Combinatorics Seminar

Title:ÌýThe Many Faces of Circulation Algebras

Speaker: Nick Olson-Harris
Affiliation: University of À¶Ý®ÊÓÆµ
Room: MC 6486

Abstract:ÌýÌýThe circulation algebra is a commutative graded algebra associated to a graph, introduced by Wagner in 1998 to study flows.

Friday, June 29, 2018 3:30 pm - 3:30 pm EDT (GMT -04:00)

Tutte Colloquium - Karen Yeats

Title:ÌýThe c2 invariant at p=2 by counting edge bipartitions

Speaker: Karen Yeats
Affiliation: University of À¶Ý®ÊÓÆµ
Room: MC 5501

Abstract:

Since no one provided a visitor or volunteered for this week, I will explain how to prove a special case of a conjecture about the c2 invariant.Ìý

Thursday, July 5, 2018 1:30 pm - 1:30 pm EDT (GMT -04:00)

Algebraic Graph Theory Seminar

Title:ÌýEdge State Transfer

Speaker: Tina Chen
Affiliation: University of À¶Ý®ÊÓÆµ
Room: MC 6486

Abstract:ÌýMost research about quantum state transfer on graphs use adjacency matrices as their Hamiltonians and investigate the transfers between single vertex states.