Таки нашел, это связано с внешними произведениями. Например,
Цитата:
Suppose that A is an mn matrix with entries from a field F and 1rmin(mn) . The rth compound matrix or rth adjugate of A is the rmrn matrix whose entries are detA[]) , Qrm and Qrn , arranged in lexicographic order and we use submatrix notation. The notation for this matrix is Cr(A) .
Properties
1. Cr(AB)=Cr(A)Cr(B) when r is less than or equal to the number of rows or columns of A and B
2. If A is nonsingular, the Cr(A)−1=Cr(A−1) .
3. If A has complex entries, then Cr(A)=(Cr(A)) .
4. Cr(AT)=(Cr(A))T
5. Cr(A)=Cr(A)
6. For any kF Cr(kA)=krCr(A)
7. Cr(In)=Irn
8. det(Cr(A))=det(A)r−1n−1 (Sylvester -- Franke theorem)
Вот ссылка ( с нормальными формулами)
http://planetmath.org/encyclopedia/RthAdjugate.html