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7.10.6.17 ncrepSubstract
Procedure from library ncrat.lib (see ncrat_lib).
- Usage:
- ncrep s = ncrepSubstract(q, r);
q, r both of type ncrep
- Return:
- representation s of h = f - g
if q, r are representations of f, g
- Note:
- operator '-' for ncrep is overloaded
with this procedure, hence
ncrep s = q - r;
yields the same result as
ncrep s = ncrepSubstract(q, r);
Example:
| | LIB "ncrat.lib";
ncInit(list("x", "y", "z"));
ncrat f = ncratFromString("x");
ncrat g = ncratFromString("y");
ncrep q = ncrepGet(f);
ncrep r = ncrepGet(g);
ncrep s1, s2;
s1 = ncrepSubstract(q, r);
print(s1);
==> lvec=
==> 0,1,0,1
==>
==> mat=
==> x, -1,0, 0,
==> -1,0, 0, 0,
==> 0, 0, -y,1,
==> 0, 0, 1, 0
==>
==> rvec=
==> 0,
==> 1,
==> 0,
==> 1
s2 = q - r;
print(s2);
==> lvec=
==> 0,1,0,1
==>
==> mat=
==> x, -1,0, 0,
==> -1,0, 0, 0,
==> 0, 0, -y,1,
==> 0, 0, 1, 0
==>
==> rvec=
==> 0,
==> 1,
==> 0,
==> 1
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