Tome 32 (1991) no. 3

Sommaire

What is a double central extension ? (the question was asked by Ronald Brown)
p. 191-201
The connection between the fundamental groupoid and a unification algorithm for syntactil algebras (extended abstract)
p. 203-242
On Priestley duals of products
p. 243-256
Strong regular and dense generators
p. 257-276