Dear colleagues:

We announce the following seminar at IPMU
(the Institute for the Physics and Mathematics of the Universe).

Regards,

Satoshi Kondo (IPMU)
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Speaker: Hiroyuki Nakaoka (University of Tokyo)

Title: Introduction to the 2-categorical homological algebra

Date:	Mar 19, 2009, 15:30 - 17:00

Place: Seminar Room at IPMU Prefab. B

Abstract:
This talk is about a categorification. A symmetric categorical group
is regarded as a categorification of an abelian group. As such, the
2-category of symmetric categorical groups (SCG) has some
homological-algebraic properties.
A natural question is: "How can we treat this 2-categorical structure
(in abstracto)?"
We answer this by defining a 2-categorical analog of an abelian
category. The axiomatic and self-dual definition enables us to
simplify the proofs, just like the abelian category theory.
The paper concerning this talk is available at.
"http://www.tac.mta.ca/tac/index.html#vol20".
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You can check the location from
http://www.ipmu.jp/access/img/KashiwaCampusMap.png

The schedule of the seminar can be checked from
http://db.ipmu.jp/seminar/?mode=seminar_recent

-- 
Satoshi Kondo