details
Title
Satellites in SemiAbelian Categories
Abstract After giving a short introduction to semiabelian categories, I
will compare three different viewpoints of semiabelian homology. The last
of these uses the universal properties of a long exact homology sequence to
make homology into a limit or pointwise Kan extension. This allows us to
define homology without using projective objects. I will give some examples
and also discuss what happens to this viewpoint when enough projectives are
available.
Speaker(s)
Julia Goedecke (Centre for Mathematical Sciences  Univ. Cambridge)
Date
May 12, 2009 Time 16.00 Room
Sala 5.5
