AA = matrix([[-1,1,2],[3,-1,1],[-1,3,4]])
print AA
 n = AA.determinant()
 print n
AA11 =matrix([[-1,1],[3,4]])
AA12=matrix([[3,1],[-1,4]])
AA13=matrix([[3,-1],[-1,3]])
print AA13.determinant()
AA21=matrix([[1,2],[3,4]])
print AA21.determinant()
AA22=matrix([[-1,2],[-1,4]])
print AA22.determinant()
AA23=matrix([[-1,1],[-1,3]])
print AA23.determinant()
AA31=matrix([[1,2],[-1,1]])
print AA31.determinant()
AA32=matrix([[-1,2],[3,1]])
print -AA32.determinant()
AA33=matrix([[-1,1],[3,-1]])
print AA33.determinant()
A11=AA11.determinant()
print A11
A12=AA12.determinant()
print A12
A13=AA13.determinant()
print A13
A21=AA21.determinant()
print A21
A22=AA22.determinant()
print A22
A23=AA23.determinant()
print A23
A31=AA31.determinant()
print A31
A32=AA32.determinant()
print A32
A33=AA33.determinant()
print A33
Y=matrix([[A11,A12,A13],[A21,A22,A23],[A31,A32,A33]])
print Y
Y/ n
print (Y/n)

Strang-6.7-U (last edited 2010-12-17 06:58:08 by Anuradha)