SMS scnews item created by Kevin Coulembier at Fri 18 Aug 2017 1612
Type: Seminar
Distribution: World
Expiry: 13 Oct 2017
Calendar1: 25 Aug 2017 1200-1300
CalLoc1: Carslaw 375
CalTitle1: Lattices and homological algebra
Auth: kevinc@91.177.117.248 (kcou7211) in SMS-WASM

# Algebra Seminar: Dancso -- Lattices and homological algebra

Zsuzsanna Dancso (University of Sydney)

Friday 25 August, 12-1pm, Place: Carslaw 375

Title: Lattices and homological algebra

Abstract: I’ll begin with some dreams and motivation regarding lifting notions of
lattice theory to homological algebra.  For most of the talk, we’ll study a concrete
example: the lattices of integer cuts and flows associated to a finite graph.  Given a
graph G and choice of spanning tree T, we construct an algebra A(G,T) such that the
Groethendieck group of the category of finitely generated A(G,T)-modules with the Euler
(Ext) pairing contains the cut and flow lattices of G as orthogonal complements.  We’ll
discus many open problems regarding generalisations and possible uses for the extra
structure that is present at the category level, such as gradings.  Joint work in
progress with Anthony Licata.


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