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AlffDivisorClassRep

Find the class representation of a divisor class in given generators.

Syntax:

L := AlffDivisorClassRep(D);

list
  L  
exponents
alff divisor
  D  

See also:  AlffClassGroupGens, AlffClassGroup, AlffInit, AlffOrders

Description:

Let F/k be a global function field and A_1, D_1, \dots, D_m be a generating system as returned by AlffClassGroupGens(F). Let d_i be the (finite) orders of [D_i]. This function returns a list consisting of a, r_1, \dots, r_m \in Z with 0 <= r_i < d_i such that [D] = a [A_1] + r_1 [D_1] + \dots + r_m [D_m] holds.


Example:



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