Supported by the NSF of China(11171194);by the NSF of Shanxi Province(2012011001-1)
For any prime p, all finite noncyclic p-groups which contain a self-centralizing cyclic normal subgroup are determined by using cohomological techniques. Some applications are given, including a character theoretic de...
This paper obtains a necessary and sufficient condition for an irreducible complex matrix whose comparison matrix is a singular M-matrix to be singular. This is used to establish a necessary and sufficient condition f...
Irreducible graphs are those graphs which can hot be embedded on some surface but deleting ally edge of this graph, the resultant graph can be embedded on the surface. This paper characterizes one kind of irreducible ...
Using the symbol calculus developed by Berezin, Kree and Raczka, it is shown that the algebra generated by the canonical commutation relation (CCR) is splitted into creation part and annhilation part with holomorphic ...