a matrix, a map from a graded free module of rank n to the module M whose matrix entry h_(i,j) is obtained from the function f by evaluating f(i,j).
Description
This is the same as calling map(M,R^n,f), except that the degrees of the basis elements of the source module are chosen in an attempt to ensure that the resulting map is homogeneous of degree zero.
i1 : R = GF(9,Variable=>a)[x,y,z];
i2 : f = map(R^1, 3, (i,j) -> (a^j * x - y)^(j+1))
o2 = | 1x-1y a+1x2axy1y2 -a-1x3-1y3 |
1 3
o2 : Matrix R <--- R
i3 : source f
3
o3 = R
o3 : R-module, free, degrees {1..3}