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7.10.6.30 ncrepGetRegularZeroMinimal
Procedure from library ncrat.lib (see ncrat_lib).
- Usage:
- ncrep q = ncrepGetRegularZeroMinimal(f, vars);
- Return:
- q is a representation of f with
minimal dimension
- Assumption:
- f is regular at zero, i.e.,
f(0) has to be defined
- Note:
- list vars = list(x1, ..., xn) has to consist
exactly of the nc variables occurring in f
Example:
| | LIB "ncrat.lib";
ncInit(list("x", "y"));
ncrat f = ncratFromString("inv(1+x*y-y*x)");
list vars = list(x, y);
ncrep q = ncrepGetRegularZeroMinimal(f, vars);
q;
==> lvec=
==> 0,1,0
==>
==> mat=
==> 1, y, 0,
==> -x,1, -y,
==> 0, -x,1
==>
==> rvec=
==> 0,
==> -1,
==> 0
==>
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