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7.7.7.0. iv2lpList
Procedure from library fpadim.lib (see fpadim_lib).
- Usage:
- iv2lpList(L); L a list of intmats
- Return:
- ideal
- Purpose:
- Converting a list of intmats into an ideal of corresponding monomials
The rows of the intmat corresponds to an intvec, which stores the
monomial.
For the encoding of the variables see the overview.
- Assume:
- - The rows of each intmat in L must correspond to a Letterplace monomial
- basering has to be a Letterplace ring
Example:
| | LIB "fpadim.lib";
ring r = 0,(x,y,z),dp;
def R = makeLetterplaceRing(5); // constructs a Letterplace ring
setring R; // sets basering to Letterplace ring
intmat u[3][1] = 1,1,2; intmat v[1][3] = 2,1,3; intmat w[2][3] = 3,1,1,2,3,1;
// defines intmats of different size containing intvec representations of
// monomials as rows
list L = u,v,w;
print(u); print(v); print(w); // shows the intmats contained in L
==> 1
==> 1
==> 2
==> 2 1 3
==> 3 1 1
==> 2 3 1
iv2lpList(L); // returns the corresponding monomials as an ideal
==> _[1]=x(1)
==> _[2]=y(1)
==> _[3]=y(1)*x(2)*z(3)
==> _[4]=z(1)*x(2)*x(3)
==> _[5]=y(1)*z(2)*x(3)
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