Ch-4-Prob-7-New-이승진

A=matrix(QQ, 3, 3, [2,3,-1,3,8,2,4,-1,-3]) adj_A=A.adjoint() # Compute adjoint matrix of A A_cofactor=adj_A.transpose() # Find a matrix that shows all cofactors of A print A_cofactor 

[-22  17 -35]
[ 10  -2  14]
[ 14  -7   7]

[-22  17 -35]
[ 10  -2  14]
[ 14  -7   7]

B=matrix(QQ, 5, 5, [2,1,1,0,1,2,1,2,-1,1,0,0,1,2,0,1,0,3,1,1,2,1,1,2,1]) adj_B=B.adjoint() # Compute adjoint matrix of B B_cofactor=adj_B.transpose() # Find a matrix that shows all cofactors of B print B_cofactor 

[-5  5  0  0  5]
[ 2 -2  0  0 -2]
[-2  2  0  0  2]
[ 0  0  0  0  0]
[ 3 -3  0  0 -3]

[-5  5  0  0  5]
[ 2 -2  0  0 -2]
[-2  2  0  0  2]
[ 0  0  0  0  0]
[ 3 -3  0  0 -3]