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D.15.2.4 negativedivisor

Procedure from library divisors.lib (see divisors_lib).

Usage:
negativedivisor(A); A*(-1); A = divisor.

Assume:
A is a divisor on X.

Return:
a divisor on X

Theory:
The procedure will interchange the numerator and denominator ideals.

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.