# Singular

##### 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) ```