k=var('k')
a=matrix([[k,2,3],[k,k,4],[k,k,k]])
print a
a.det()
solve(a.det(),k)
a=matrix([[4,2,3],[4,4,4],[4,4,4]])
print a
a.pivots()
a=matrix([[2,2,3],[2,2,4],[2,2,2]])
print a
a.pivots()
a=matrix([[0,2,3],[0,0,4],[0,0,0]])
print a
a.pivots()

Strang-page19,30-U (last edited 2010-12-17 04:30:14 by tejaswi)