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D.6.9.18 squarefree

Procedure from library hnoether.lib (see hnoether_lib).

Usage:
squarefree(f); f poly

Assume:
f is a bivariate polynomial (in the first 2 ring variables).

Return:
poly, a squarefree divisor of f.

Note:
Usually, the return value is the greatest squarefree divisor, but there is one exception: factors with a p-th root, p the characteristic of the basering, are lost.

Example:
 
See also: allsquarefree.


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