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Barcelona Algebraic Topology Group

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Barcelona Algebraic Topology Group
Friday's Topology Seminar 2016-2017 PDF Print E-mail

Date and Place: January 27th 11:45h, seminar room C3b/158
Speaker:
Jesper Moller (University of Copenhagen)
Title:
Equivariant Euler characteristics of subspace posets

Abstract:

\begin{center}
\begin{tabular}[t]{>{$}c{$}c<{$}}}
-\chi_r(n,2) & n=1 & n=2 & n=3 & n=4 & n=5 & n=6 \\ \hline
r=1 &   1  &                0  &                0  &                0  &                0  &                0\\
2 &        1  &               1  &               1  &               1  &               1  &               1\\
3 &        1  &               4  &              12  &              32  &              80  &             192\\
4 &        1  &              13  &             101  &             645  &            3717  &           20101\\
5 &        1  &              40  &             760  &           11056  &          140848  &         1657216\\
6 &        1  &             121  &            5481  &          176921  &         4865465  &       121991097\\
7 &         1  &             364  &           38852  &         2742192  &       160444704  &      8459901568\\
8 &         1  &            1093  &          273421  &        41843005  &      5160361501  &    567145627357\\
9 &         1  &            3280  &         1918320  &       633421856  &    163640016032  &  37253059018752\\
10 &       1  &            9841  &        13441361  &      9548966001  &   5145988736049 &2415591291535153
\end{tabular}
\end{center}

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This is the web site of the Algebraic Topology Team in Barcelona (Grup de Topologia Algebraica de Barcelona, 2014SGR-42 and Homotopy theory of algebraic structures, MTM2016-80439-P).

Our research interests include a variety of subjects in algebraic topology, group theory, homological algebra, and category theory. Here you will find information about us and our common activities.

 

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