my beamer presentation - Departament de matemà tiques
my beamer presentation - Departament de matemà tiques
my beamer presentation - Departament de matemà tiques
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A Σ 4 -poset<br />
Outline<br />
Definitions and examples<br />
Homological properties of kC-mod<br />
An example<br />
Finite categories and their algebras<br />
Re<strong>presentation</strong>s and modules<br />
Motivation<br />
The poset of all non-trivial 2-subgroups of Σ 4 , S 2 (Σ 4 ):<br />
· · ·<br />
· · ·<br />
D 8 <br />
D 8 D 8<br />
<br />
<br />
C 2 × C 2 C 4 V<br />
<br />
<br />
<br />
<br />
C 2<br />
C 2<br />
C 2<br />
<br />
C 2<br />
C 2<br />
Fei Xu<br />
Finite category algebras
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