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# Farbod Shokrieh : Divisors on graphs, connected flags, and syzygies

Associated to every finite graph G there is a canonical ideal which encodes the linear equivalences of divisors on G. We study this ideal and its associated initial ideal. We give an explicit description of their syzygy modules and the Betti numbers in terms of the "connected flags" of G. This resolves open questions posed by Postnikov-Shapiro, Perkinson-Perlmen-Wilmes, and Manjunath-Sturmfels. This is a joint work with Fatemeh Mohammadi.

**Category**: Algebraic Geometry**Duration**: 01:34:54**Date**: January 16, 2013 at 4:25 PM-
**Tags:**seminar, Algebraic Geometry Seminar

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