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7.7.4.10 lpVarAt
Procedure from library freegb.lib (see freegb_lib).
- Usage:
- lpVarAt(p, pos); p a poly, pos an int
- Return:
- poly
- Assume:
- basering is a Letterplace ring
- Purpose:
- returns the variable (as a poly) at position pos of the poly p
Example:
| LIB "freegb.lib";
ring r = 0,(x,y),dp;
def R = makeLetterplaceRing(5);
setring R;
poly p = y*y*x;
lpVarAt(p, 3);
==> x
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