a=matrix([[2,-1,-1],[-1,2,-1],[-1,-1,2]])
print a
det(a)
//a is against//
b=matrix([[2,-1,-1],[-1,2,1],[-1,1,2]])
print b
det(b)
//b is for//
c=matrix([[0,1,2],[1,0,1],[2,1,0]])
d=c*c;d
det(d)
//d is for//

Strang-6.2-1-U (last edited 2010-12-18 12:17:32 by 10)