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CATEGORIES:Study group in Graph Theory\, Topology and Algorit
hms
SUMMARY:Representing matroids over tracts - Nathan Bowler\
, Hamburg
DTSTART:20201207T140000Z
DTEND:20201207T150000Z
UID:TALK4383AT
URL:/talk/index/4383
DESCRIPTION:I'll explain a generalisation of the notion of rep
resentable matroids over fields which allows us to
encode a number of important classes of matroids
and the relationships between them in terms of sim
ple algebraic objects generalising fields\, called
tracts\, and the morphisms between them. This giv
es a unified treatment of representable\, oriented
\, regular and valuated matroids. I will then expl
ain how to turn simple algebraic facts about tract
s into theorems about the corresponding matroid cl
asses\, such as that any binary orientable matroid
is regular.
LOCATION: https://bham-ac-uk.zoom.us/j/84817190495
CONTACT:Johannes Carmesin
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