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Message from discussion Pari stack growning out of bounds
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Rob Beezer  
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 More options Sep 24 2012, 4:45 pm
From: Rob Beezer <goo...@beezer.cotse.net>
Date: Mon, 24 Sep 2012 13:45:28 -0700 (PDT)
Local: Mon, Sep 24 2012 4:45 pm
Subject: Re: [sage-devel] Pari stack growning out of bounds
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On Monday, September 24, 2012 1:29:24 PM UTC-7, John Cremona wrote:

> Does anyone know why QQbar is being used here?

For "simple" graphs, the adjaceny matrix will be symmetric, so the
eigenvalues could go into AA instead of QQbar, but I would guess the
problem (comparison with zero) might persist?

Where would you suggest they go?  Right now, I think these are just
eigenvalues of a matrix over QQ with those outside of QQ going into QQbar
(iirc).

Rob


 
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