Une Condition Finitude Pour les Semi-groupes
Une condition suffisante de reconnaissabilité dans un monoïde partiellement commutatif
Une extension du lemme de Green et ses applications
Une famille de monoïdes inversifs 0-bisimples généralisant le monoïde bicyclique
Une representation fidèle des groupes d'un monoïde de relations binaires sur un ensemble fini.
Une topolgie du monoide libre.
Unification in varieties of idempotent semigroups.
Uniform semigroups whose proper quasiideal s are power joined.
Uniformly quasiregular semigroups in two dimensions.
Uniformly synchronous codes.
Uniformly synchronous limited codes.
Uniformly -regular rings and semigroups: a survey
Unifying congruences on S(I).
Union and symmetry preserving endomorphisms of the semigroup of all binary relations on a set
Union and symmetry preserving homomorphisms of semigroups of closed relations.
Union preserving homomorphisms of semigroups of closed relations.
Unions of dihedral groups.
Unique prime factorization in a partial semigroup of matrix-polynomials
We establish a unique factorization result into irreducibel elements in the partial semigroup of 2 × 2-matrices with entries in K[x] whose determinant is equal to 1, where K is a field, and where multiplication is defined as the usual matrix-multiplication if the degrees of the factors add up. This investigation is motivated by a result on matrices of entire functions.
Universal coextensions within a variety.
Universal expansion of semigroup varieties by regular involution.