a=matrix([[1,0,0],[0,1,0],[0,0,1]])
C=det(a)
if ( C == -1 ):
    F=det(a**2)
    print F
    D=det(0.5*a)
    print D
    G=inv(a)
    print G
    E=det(-a)
    print(E)
else :
    print "not valid"

Strang-4.2-3-U (last edited 2010-12-18 10:27:59 by prakasam team)