On 3/15/13 6:27 AM, pascal wrote:
Le vendredi 15 mars 2013 08:44:21 UTC+1, Charles Bouillaguet a écrit :
So am I. However, it's in the pipeline
(http://trac.sagemath.org/sage_trac/ticket/13703
<http://trac.sagemath.org/sage_trac/ticket/13703>)
Thanks for the link. The code for circulant matrix generation :
def hankel(R,c,r): entries=c+r[1:]; return matrix(R, len(c), len(r),
lambda i,j: entries[i+j])
def circulant(R,E): return hankel(R, E, E[-1:]+E[:-1])
doesn't return the _usual_ circulant matrix (as a result of successive
right shifts) but rather a skew-circulant matrix :
I should have read the rest of the messages more carefully before
sending my original response to this thread. I see we're already
discussing the code I proposed.
Thanks for catching the error! I've changed the trac ticket to reflect
your modifications.
Thanks,
Jason
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