Truncated microsupport and holomorphic solutions of D-modules
Tubular mutations
Twist quantization of string and Hopf algebraic symmetry.
Twisted (co)homologica stability for monoids of endomorphisms.
Twisted gamma filtration and algebras with orthogonal involution
For the Grothendieck group of a split simple linear algebraic group, the twisted γ-filtration provides a useful tool for constructing torsion elements in -rings of twisted flag varieties. In this paper, we construct a non-trivial torsion element in the γ-ring of a complete flag variety twisted by means of a PGO-torsor. This generalizes the construction in the HSpin case previously obtained by Zainoulline.
Twisted group rings of strongly unbounded representation type
Let S be a commutative local ring of characteristic p, which is not a field, S* the multiplicative group of S, W a subgroup of S*, G a finite p-group, and a twisted group ring of the group G and of the ring S with a 2-cocycle λ ∈ Z²(G,S*). Denote by the set of isomorphism classes of indecomposable -modules of S-rank m. We exhibit rings for which there exists a function such that and is an infinite set for every natural n > 1. In special cases contains every natural number m >...
Twisted Hopf Algebras.
Twists of Central Simple Algebras and Endomorphism Algebras of Some Abelian Varieties.
Two classes of almost Galois coverings for algebras
We prove that for any representation-finite algebra A (in fact, finite locally bounded k-category), the universal covering F: Ã → A is either a Galois covering or an almost Galois covering of integral type, and F admits a degeneration to the standard Galois covering F̅: Ã→ Ã/G, where is the fundamental group of . It is shown that the class of almost Galois coverings F: R → R’ of integral type, containing the series of examples from our earlier paper [Bol. Soc. Mat. Mexicana 17 (2011)], behaves...
Two elementary commutativity theorems for generalized Boolean rings.
Two examples of inverse semigroups algebras.
Two results concerning symmetric bi-derivations on prime rings.
Two-dimensional orders of finite representation type.
Two-sided essential nilpotence.