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Re: [Axiom-developer] emacs mode

From: Martin Rubey
Subject: Re: [Axiom-developer] emacs mode
Date: 03 Oct 2007 10:19:47 +0200
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4

(I hope I do not offend you by forwarding this to the lists)

Francois Maltey <address@hidden> writes:

> When I test linear algebra I noticed that nullSpace return a basis of the
> kernel, it's right, but I expect an empty list when the matrix is inversible.
> The documentation of axiom announces it's the null vector in this case.  So
> it isnot a bug... but I think it's a silly feature because it becomes
> impossible to get the dimension by the length function.

I think you are right.  In fact, the user doc says it returns a basis, only the
internal doc says what you mentioned.  The modification would be trivial, only,
it might break something...

> What is your advice ? 

use nullity.


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