Autour d'une conjecture de Serge Lang.
Average multiplicative orders of elements modulo n
Avoiding maximal parabolic subgroups of .
Axiomatization of quasigroups
Quasigroups were originally described combinatorially, in terms of existence and uniqueness conditions on the solutions to certain equations. Evans introduced a universal-algebraic characterization, as algebras with three binary operations satisfying four identities. Now, quasigroups are redefined as heterogeneous algebras, satisfying just two conditions respectively known as hypercommutativity and hypercancellativity.
Axioms for trimedial quasigroups
We give new equations that axiomatize the variety of trimedial quasigroups. We also improve a standard characterization by showing that right semimedial, left F-quasigroups are trimedial.
- лупы
Baer extensions of rings and Stone extensions of semigroups.
Baer invariants in semi-abelian categories I: General theory.
Baer invariants in semi-abelian categories II: Homology.
Baer sums and fibered aspects of Mal'cev operations
Baer-Stone semigroups.
Balanced Identities in Algebras of Quasigroups.
Balanced laws on GD-groupoids.
Balanced laws on ternary GD-groupoids.
Balanced order relations on completely simple semigroups.
Balanced subsets of a symmetric inverse semigroup.
Ballanced Laws On GD-Groupoids
Band decomposition of weakly exponential semigroups.
Band of t-archimedean semigroups.
Bands of Groups with Universal Properties.