Geodesic

Sommaire

Free profinite semigroups over semidirect products
p. 3-31
Extensions by means of local groups
p. 32-37
A proof and generalization of the Higgins theorem on divisors of semigroups of isotonic transformations
p. 38-44
Unary operations on pseudovarieties of semigroups
p. 45-52
Pseudovarieties of associative rings: linearity congruence and decidability
p. 53-57
Embeddings of pseudofree semigroups
p. 58-64
Maximal pseudovarieties of finite monoids and semigroups
p. 65-70
Permutative pseudo-varieties of associative algebras over a finite field
p. 71-79
Eilenberg's theorem for positive varieties of languages
p. 80-90
Characterization of varieties of semigroups of finite index in the language of ``prohibited divisors''
p. 91-99