- 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.
Bands of nil-extensions of right simple semigroups.
Bands of power-joined semigroups.
Bands of unipotent monoids.
Bar complexes and extensions of classical exponential functors
We compute Ext-groups between classical exponential functors (i.e. symmetric, exterior or divided powers) and their Frobenius twists. Our method relies on bar constructions, and bridges these Ext-groups with the homology of Eilenberg-Mac Lane spaces.This article completes earlier results of the author, and provides an alternative approach to classical Ext-computations in the category of strict polynomial functors over fields. We also obtain significant Ext-computations for strict polynomial functors...
Bar-invariant bases of the quantum cluster algebra of type
We construct bar-invariant -bases of the quantum cluster algebra of the valued quiver , one of which coincides with the quantum analogue of the basis of the corresponding cluster algebra discussed in P. Sherman, A. Zelevinsky: Positivity and canonical bases in rank 2 cluster algebras of finite and affine types, Moscow Math. J., 4, 2004, 947–974.