In this article, the Rosenbloom-Tsfasman metric of matrix product codes over finite commutative rings is studied and the lower bounds for the minimal Rosenbloom- Tsfasman distances of the matrix product codes axe obta...
Supported by the NSF of China(10971049;10971052);the NSF of Hebei Province(A2008000135;A2009000253)
Let H be a finite-dimensional weak Hopf algebra and A a left H-module algebra with its invariant subalgebra A^H.We prove that the smash product A#H is an A-ring with a grouplike character, and give a criterion for A#H...
supported by NSFC (10631050);NKBRPC (2006CB805905);China-France-Russian mathematics collaboration grant (34000-3275100) from Sun Yat-Sen University
I.A.B. Strachan introduced the notion of a natural Frobenius submanifold of a Frobenius manifold and gave a sufficient but not necessary condition for a submanifold to be a natural Frobenius submanifold. This article ...