source(Matrix) -- find the source module of matrix

Synopsis

• Function: source

• Usage:

  source f

• Inputs:
  • f, a matrix
• Outputs:
  • the source module of f

Description

i1 : R = ZZ[x,y,z];

i2 : M = R^1/(x,y,z);

i3 : N = R^1/(x^2,y^2,x*y*z,z^2);

i4 : g = map(N,M,x*y);

o4 : Matrix

i5 : source g

o5 = cokernel | x y z |

                            1
o5 : R-module, quotient of R