Article ID Journal Published Year Pages File Type
4600916 Linear Algebra and its Applications 2012 29 Pages PDF
Abstract

The variety C2(A) of pairs of commuting matrices in the centralizer of n×n matrix A is known to be irreducible if A is 2-regular matrix. We prove that the variety C2(A) is irreducible also for 3-regular matrices A and in some 4-regular cases, but on the other hand, it can be reducible if A is 5-regular matrix.

Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory