We define Drinfeld orbifold algebras as filtered algebras deforming the skew group algebra (semi-direct product) arising from the action of a finite group on a polynomial ring. They simultaneously generalize Weyl algebras, graded (or Drinfeld) Hecke algebras, rational Cherednik algebras, symplectic reflection algebras, and universal enveloping algebras of Lie algebras with group actions. We giv...

Abstract We provide the structure of unit group $${\mathbb {F}}_{p^k}S_n$$ F p k S n , where $$p>n$$ > is a prime and $$S_n$$ denotes symmetric on n l...

In this paper, first we give the notion of a representation relative Rota-Baxter Lie algebra and introduce cohomologies with coefficients in representation. Then classify abelian extensions algebras using second cohomology group, skeletal 2-algebras third group as applications. At last, established general framework representations algebras, which is consistent associative literature, Applicati...

We study the complexity of multiplication in noncommutative group algebras which is closely related to the complexity of matrix multiplication. We characterize such semisimple group algebras of the minimal bilinear complexity and show nontrivial lower bounds for the rest of the group algebras. These lower bounds are built on the top of Bläser’s results for semisimple algebras and algebras with ...