CTGDC, Tome 18 (1977)

Sommaire du Fascicule no. 1

Fermeture standard des catégories algébriques II

Lair, Christian

p. 3-60

An extended comparison functor for triples

Perry, Robert J.

p. 61-65

Calcul des relations inverses

p. 67-100

Sommaire du Fascicule no. 2

Sheaves and concepts : a model-theoretic interpretation of Grothendieck topoi

Reyes, Gonzalo E.

p. 105-137

Coherent prohomotopical algebra

Porter, Timothy

p. 139-179

Sur les quasi-topos

p. 181-218

Sommaire du Fascicule no. 3

A closed category of reflexive topological abelian groups

p. 221-248

On categories into which each concrete category can be embedded. II

Koubek, Václav

p. 249-269

Principal homogeneous objects as representable functors

Van Osdol, D. H.

p. 271-289

Internal presheaves toposes

p. 291-330

Sommaire du Fascicule no. 4

Décompositions et Lax-complétions

Guitart, René ; Van den Bril, Luc

p. 333-407

An abstract setting for homotopy pushouts and pullbacks

Spencer, Christopher B.

p. 409-429

Erratum à l'article « Double groupoids and crossed modules »

Brown, R. ; Spencer, C. B.

p. 430

Déjà vingt ans ...

Ehresmann, Charles ; Ehresmann, Andrée

p. 431-432