Singular Manual: ncrepRegularMinimize

| #### 7.10.6.29 ncrepRegularMinimize Procedure from library `ncrat.lib` (see ncrat_lib). Usage: ncrep s = ncrepRegularMinimize(q, vars, point); Return: ncrep s representing the same rational function as ncrep q, where s is of minimal size Assumption: q is regular at scalar point a, i.e., if one substitutes in ai for all nc variables xi in q then q.mat has to be invertible Note: list vars = list(x1, ..., xn) has to consist exactly of the nc variables occurring in q and list point = list(a1, ..., an) consists of scalars Example:
    LIB "ncrat.lib";
    ncInit(list("x", "y"));
    ncrat f = ncratFromString("inv(x*y)");
    ncrep q = ncrepGet(f);
    ncrepDim(q);
    ==> 5
    ncrep s = ncrepRegularMinimize(q, list(x, y), list(1, 1));
    ncrepDim(s);
    ==> 2
    s;
    ==> lvec=
    ==> -1,0
    ==>
    ==> mat=
    ==> -y,x+1,
    ==> 0, -x
    ==>
    ==> rvec=
    ==> 1,
    ==> -1
    ==>

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