Tome 26 (1985) no. 1

Sommaire

Exact sequence interlocking and free homotopy theory
p. 3-31
Models for actions of certain groupoids
p. 33-42
On product and change of base for toposes
p. 43-61
Torsors and special extensions
p. 63-90
Coherent euclidean geometry
p. 91-111