|  |  D.12.8.1 isuni Procedure from libraryrootsur.lib(see  rootsur_lib).
 
Example:Usage:
isuni(p); poly p;
Return:
poly: if p is a univariate polynomial, it returns the variable. If
not, zero.
 See also:
 whichvariable.|  | LIB "rootsur.lib";
ring r = 0,(x,y),dp;
poly p = 6x7-3x2+2x-15/7;
isuni(p);
==> x
isuni(p*y);
==> 0
 | 
 
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