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7.10.6.19 ncrepInvert
Procedure from libraryncrat.lib (see ncrat_lib).
- Usage:
- ncrep s = ncrepInvert(q);
q of type ncrep - Return:
- representation of h = inv(f)
if q is a representation of f
LIB "ncrat.lib";
ncInit(list("x", "y", "z"));
ncrat f = ncratFromString("2*x*y");
ncrep q = ncrepGet(f);
ncrep s = ncrepInvert(q);
print(s);
==> lvec=
==> 1,0,0,0,0
==>
==> mat=
==> 0,0, 0, 0, 1,
==> 0,0, 0, -1/2*x,1/2,
==> 0,0, -1,1/2, 0,
==> 0,-y,1, 0, 0,
==> 1,1, 0, 0, 0
==>
==> rvec=
==> 1,
==> 0,
==> 0,
==> 0,
==> 0
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