* Paper: The Euler characteristic of a category
@ 2006-10-10 9:36 Tom Leinster
0 siblings, 0 replies; only message in thread
From: Tom Leinster @ 2006-10-10 9:36 UTC (permalink / raw)
To: categories
The following paper is available. It is the full version of the talk I
gave at CT06.
"The Euler characteristic of a category"
The Euler characteristic of a finite category is defined and shown to be
compatible with Euler characteristics of other types of object,
including orbifolds. A formula is proved for the cardinality of a
colimit of sets, generalizing the classical inclusion-exclusion formula.
Both rest on a generalization of Mobius-Rota inversion from posets to
categories.
http://arxiv.org/abs/math.CT/0610260
Best wishes,
Tom
--
Tom Leinster <tl@maths.gla.ac.uk>
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2006-10-10 9:36 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-10-10 9:36 Paper: The Euler characteristic of a category Tom Leinster
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).