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D.15.16.2 ringOf

Procedure from library polyclass.lib (see polyclass_lib).

Usage:
ringOf(F); F Poly

Return:
F.value

Example:
 
LIB "polyclass.lib";
ring R=0,(x,y),ds;
poly f = x+y;
Poly F = makePoly(f);
ringOf(F);
==> // coefficients: QQ considered as a field
==> // number of vars : 2
==> //        block   1 : ordering ds
==> //                  : names    x y
==> //        block   2 : ordering C

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