Mg. Marques et al., THE NUMBER OF INVARIANT POLYNOMIALS OF A MATRIX WITH PRESCRIBED COMPLEMENTARY PRINCIPAL SUBMATRICES, Linear algebra and its applications, 251, 1997, pp. 167-179
We study the number of invariant polynomials of [A(i,j)], i,j is an el
ement of {1,2}, when the submatrices A(1,1) and A(2,2) are prescribed.
(C) Elsevier Science Inc., 1997