Tome 52 (2011) no. 1

Sommaire

The ziqqurath of exact sequences of n-groupoids
article no. 1, 43 p.
Singularities and regular paths (an elementary introduction to smooth homotopy)
article no. 2, 32 p.
A characterization of finite cocomplete homological and of semi-abelian categories
article no. 3, 4 p.