摘要
设d(x),f1(x),f2(x),…,fm(x)是数域P上的一元多项式,A是一个非零n阶方阵.如果对任意的i≠j都有(fi(x),fj(x))=d(x),且[fi(A),fj(A)]=0,则m=2或者d(A)=0.特别的,当d(x)=1时,多项式的个数只能是2个,且这2个矩阵多项式秩的和也恰好是n.
Let d(x),f1 (x),f2(x),…… ,fm(x) be polynomials of one indeterminate on number field P ,A be an n" th order square matrix and A ≠ 0. If (fi(x) ,fi(x)) =d(x) and [fi (A), f, (A)] = 0 for any i ≠j , thenrn=2 or d(A) =0. In particular, the number of polynomials is onlyrn=2, and the sum of the ranks of the two matrix polynomials is just n when d(x) =1.
出处
《内蒙古大学学报(自然科学版)》
CAS
CSCD
北大核心
2010年第6期643-645,共3页
Journal of Inner Mongolia University:Natural Science Edition
关键词
多项式
矩阵
秩
polynomial matrix
rank