|
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:
|