Geometry Seminar

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The Kirchhoff matrix tree theorem, reconsidered

Speaker: Sylvain Cappell, NYU Courant Institute

Location: Warren Weaver Hall 1314 and on Zoom

Date: Tuesday, December 2, 2025, 6 p.m.

Synopsis:

In this talk a different elementary approach is made to the following problem: Given a connected graph G with chosen vertex v as a root, enumerating all trees of G rooted at v with edges directed towards v. That is, arborescences rooted at v. It uses an exterior algebra rather than the closely related determinants.

This is joint work with Ed Miller.

Notes:

In person.  Plz contact Boris Aronov for if you are not NYU-affiliated and want to attend in person, and/or to be put on the mailing list and get the Zoom information.