Package sagbi/SB.IsInToricRing: Difference between revisions
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Revision as of 12:15, 26 October 2020
| This article is about a function from ApCoCoA-2. |
SB.IsInToricRing
This function checks whether a given polynomial is in a toric subalgebra.
Syntax
SB.IsInToricRing(f: RINGELEM, S: TAGGED("$apcocoa/sagbi.Subalgebra")): BOOL
Description
This function takes a polynomial f and a subalgebra S generated by a set of terms and checks whether f is a toric ring.
@param f A polynomial
@param S A subalgebra of RingOf(f)
@return true if f is an element of S and false otherwise.
Example
Use R ::= QQ[x,y,z];
S := SB.Subalgebra(R,[x^2,x*y,y*z]);
f := x^5*y^3*z^2 + x^4*y^2*z^2;
SB.IsInToricRing(f,S);
-- true
See also
Package sagbi/SB.IsInSubalgebra
Package sagbi/SB.IsInSubalgebra_SAGBI
