jordan matrix
7.it studied the specific structure of γ(A), gived the general formula (Thcorem 2) on elements of abelian group γ(A) of A matrix and obtained a new formula on general solution of matrix equation AX=XA (Theorem 3), obtained the rules on how ic write directly the general formula and general solution with Jordan standard form of matrix A and B as well.
8.AN ALGORITHM FOR DETERMINING JORDAN CANONICAL FORM OF A REAL UNSYMMETRIC MATRIX

