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D.12.4.7 gcddivisor

Procedure from library hyperel.lib (see hyperel_lib).

Usage:
gcddivisor(p,q);

Return:
list P

Note:
gcd of two divisors

Example:
 
LIB "hyperel.lib";
ring R=7,x,dp;
// hyperelliptic curve y^2 + h*y = f
poly h=x;
poly f=x5+5x4+6x2+x+3;
// two divisors
list p=list(-1,-3,1),list(1,1,2);
list q=list(1,1,1),list(2,2,1);
gcddivisor(p,q);
==> [1]:
==>    [1]:
==>       1
==>    [2]:
==>       1
==>    [3]:
==>       1


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