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Macaulay2Doc :: source(Matrix)

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

Synopsis

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