Linear Algebra With Applications
math.emory.edu › ~lchen41 › teachingthe cofactor expansion along any row or column: Simply multiply each entry of that row or column by the corresponding cofactor and add. Theorem 3.1.1: Cofactor Expansion Theorem2 The determinant of an n n matrix A can be computed by using the cofactor expansion along any row or column of A. That is det A can be computed by multiplying each entry of
Cofactor expansion - Ximera
ximera.osu.edu › determinant › cofactorExpansionCofactor expansion - Ximera. One method for computing the determinant is called cofactor expansion. If A A is an n×n n × n matrix, with n >1 n > 1, we define the (i,j)th ( i, j) t h minor of A A - denoted Mij(A) M i j ( A) - to be the (n−1)×(n−1) ( n − 1) × ( n − 1) matrix derived from A A by deleting the ith i t h row and jth j t h ...
3.2 Cofactor Expansion and Applications
www3.nccu.edu.tw/~hsueh/la/la3-2.pdf3.2 Cofactor Expansion and Applications DEF 1 Let A = [aij]n£n.Let Mij be the (n ¡ 1) £ (n ¡ 1) submatrix of A obtained by deleting row i and column j of A. Mij = 0 B B B B B B B B @ a11 ¢¢¢ a1 j¡1 a1 j+1 ¢¢¢ a1n ai¡1 1 ¢¢¢ ai¡1 j¡1 ai¡1 j+1 ¢¢¢ ai¡1 n ai+1 1 ¢¢¢ ai+1 j¡1 ai+1 j+1 ¢¢¢ ai+1 n an1 ¢¢¢ an j¡1 an j+1 ¢¢¢ ann 1 C C C C C C C C A: The minor of aij ...