image Matrix -- image of a map

image Matrix -- image of a map

Synopsis:

Function: image -- image of a map

Input:

an instance of class Matrix.

Output:

an instance of class Module.

Code:

     -- ../../../Macaulay2/m2/matrix1.m2:466-468
     image Matrix := Module => f -> (
          if f.cache.?image then f.cache.image else f.cache.image = subquotient(f,)
          )