An embedding from a group algebra to a matrix algebra is given in this paper. By using it, a criterion for an invertible element in a group algebra is proven.
This research is supported by the National Natural Science Foundation of China(19831070)
It is already known that there are several nonlinearity criteria such asalgebraic degree nonlinearity, distance to linear structures, correlation immune, propagationcriterion, differential uniformity, which are used t...
This work was supported by the National Natural Science Foundation of China (Grant No. 19831070) and BNSF (1992003).
In this paper, we focus on the structure of p-blocks with defect group satisfying some specialcondition. These special conditions include: two elements of the defect group are conjugate to each other indefect D if and...
This work was supported by the National Natural Science Foundation of China (Grant No. 19831070).
In this paper we improve the character approach to the multiplier conjecture that we presented after 1992, and thus we have made considerable progress in the case of n = 3n1. We prove that in the case of n = 3n1 Secon...
This work was supported by the National Natural Science Foundation of China (Grant No. 19831070).
LetD be a division ring which possesses an involution a → α . Assume that $F = \{ a \in D|a = \overline a \} $ is a proper subfield ofD and is contained in the center ofD. It is pointed out that ifD is of characteri...