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D.15.25.5 zeroNcfrac
Procedure from library ncfrac.lib (see ncfrac_lib).
- Usage:
- zeroNcfrac(loc), ncloc loc
- Purpose:
- returns the zero fraction in the localization loc
- Return:
- ncfrac
Example:
| LIB "ncfrac.lib";
==> // ** redefining testNcfrac (LIB "ncfrac.lib";)
==> // ** redefining testNcloc ( LIB "ncloc.lib";)
==> // ** args must be 4 in system("install", "ncloc", "string", nclocToS\
tring, 1);
==> // ** args must be 4 in system("install", "ncfrac", "string", ncfracT\
oString, 1);
ring R = 0,(x,y,Dx,Dy),dp;
def S = Weyl();
setring S;
ncloc loc = ideal(x-53,y-7);
zeroNcfrac(loc);
==> left repr.: (1,0)
==> right repr.: (0,1)
==>
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