On Apr 23, 2008, at 5:38 PM, Martin Albrecht wrote:

> 3) search for a tri- or pentanomial with some code similar to the  
> one in blog
> post

You might want to check the NTL code for whether NTL "auto-detects"  
that you have supplied a sparse polynomial (and hence uses faster  
code for arithmetic), or whether you have to tell it explicitly. I  
vaguely remember that the preconditioned division struct has a flag  
for this, but I can't remember whether it gets set automatically.

david


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