Über die Vollständigkeit induktiver Gruppoide, die zu einer speziellen Klasse endlicher Ringe gehören
Über einge Eigenschaften der Kommutatoren der symmetrischen Halbgruppe.
Ueber die Zyklisch-inversen Unterhalbgruppen der Symmetrischen Halbgruppe tx
Une representation fidèle des groupes d'un monoïde de relations binaires sur un ensemble fini.
Une topolgie du monoide libre.
Uniformly quasiregular semigroups in two dimensions.
Unifying congruences on S(I).
Union preserving homomorphisms of semigroups of closed relations.
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.
Utilisation d'APL pour calculer des monoïdes finis