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D.15.25.2 hasRightDenom

Procedure from library ncfrac.lib (see ncfrac_lib).

Usage:
hasRightDenom(frac), ncfrac frac

Purpose:
checks if frac has a right representation

Return:
int, 1 if frac has a right representation, 0 otherwise

Example:
 
LIB "ncfrac.lib";
==> // ** redefining testNcfrac (LIB "ncfrac.lib";)
==> // ** redefining testNcloc (    LIB "ncloc.lib";)
ring R = 0,(x,y,Dx,Dy),dp;
def S = Weyl();
setring S;
ncloc loc = ideal(x-3,y+7);
ncfrac noRight = list([x+2,3*y*Dx,0,0], loc);
hasRightDenom(noRight);
==> 0
ncfrac right = list([1,Dx,Dx,1], loc);
hasRightDenom(right);
==> 1