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D.12.7.2 whichvariable
Procedure from library rootsur.lib (see rootsur_lib).
- Usage:
- whichvariable(p); poly p
- Return:
- poly: if p is a univariate monomial, the variable. Otherwise 0.
- Assume:
- p is a monomial
Example:
| LIB "rootsur.lib";
ring r = 0,(x,y),dp;
whichvariable(x5);
==> x
whichvariable(x3y);
==> 0
| See also:
isuni.
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