Singular Manual: interpretInv

| #### D.4.17.47 interpretInv Procedure from library `modules.lib` (see modules_lib). Return: interpretation of V into some Module N (inverse to interpret) Example:
    LIB "modules.lib";
    ring R;
    matrix gens[2][3] = x2,xy,4,z2x,3x+3,z;
    vector v = 2x*[gens[1..2,1]] + (y-z2)*[gens[1..2,2]] + 5*[gens[1..2,3]];
    Matrix Gens = gens;
    Module S = subquotient(Gens,zero(2,3));
    Module N = coker(id(3));
    matrix E = N.generators.hom;
    Vector E1 = [1,0,0],N;
    Vector E2 = [0,1,0],N;
    Vector E3 = [0,0,1],N;
    S.interpretation = list(list(E1,E2,E3),list([gens[1..2,1]],[gens[1..2,2]],[gens[1..2,3]]));
    Vector V = v,S;
    Vector W = interpret(V),N;
    net(V);
    ==> | -xyz2+2x3+xy2+20         |
    ==> | 2x2z2-3xz2+3xy-3z2+3y+5z |
    ==>
    Vector Vnew = interpretInv(W,S);
    net(Vnew);
    ==> | -xyz2+2x3+xy2+20         |
    ==> | 2x2z2-3xz2+3xy-3z2+3y+5z |
    ==>
    V==Vnew;
    ==> 1

User manual for Singular version 4.3.2p4, 2023, generated by texi2html.