Bill Allombert on Thu, 10 Sep 2026 18:37:06 +0200


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Re: experimental galoisinit support for non-WSS groups


On Sun, Jul 19, 2026 at 06:46:18PM +0200, Bill Allombert wrote:
> Dear PARI developers,
> 
> I have commited a new version of galoisinit that fixes most of the limitation
> of the previous version without introducing too many slowdowns.
> 
> Some remaining limitations:
> 
> 1) G.gen and G.orders only filled for WSS groups because otherwise they are not
> well-defined with the current specification otherwise. This could be addressed by
> changing the specification but this would indirectly breaks backward compatibility.
> For non WSS group G.gen=[] and G.orders=Vecsmall([])

I have made a change so that now G.gen is filled, only G.orders=Vecsmall([]).
In that case G.gen is a small set of generators.

This is mostly useful for galoisexport, which only need to export the generators.

Cheers,
Bill.