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D.15.2.19 pdivisorplus

Procedure from library divisors.lib (see divisors_lib).

Usage:
pdivisorplus(A ,B); A + B; A = pdivisor, B = pdivisor.

Assume:
A and B are polyhedral divisors on X.

Return:
a pdivisor on X

Theory:
The procedure will add the polyhedral formal sums by doing Minkowski sums.

Example:
 

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