On Thursday, December 5, 2013 6:38:23 AM UTC-5, ccandide wrote:
>
> How do you evaluate a matrix polynomial with Sage ? The obvious way 
> doesn't work :
>
>
You found an answer, but the error message could be more informative. 
 Plus, since

M = matrix([[1]])
M^2

works, in principle we want this to work too.

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