fishy rank

[Daniel Heiserer]

Hi,

something is fishy here:

I have situations where 

:rank(A)>rank([A,B]);

also 
:rank(A)>=rank(A^n)
if n is large enough.

for the above problem imagine that B=A^n

Can this be seen as a numerical problem in
terms of conditioning?


Can anyone reproduce that?


thanks

daniel



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