2008-06-16, 10:57 | #1 |
(loop (#_fork))
Feb 2006
Cambridge, England
3^{3}×239 Posts |
Very basic question about Wiedemann methods
I can see (and have checked by experiment in python and written up in wikipedia) roughly how the Coppersmith algorithm works - we know that there exists a minimal polynomial for the matrix which will annihilate the sequence y M^i x, we know a polynomial that annihilates the sequence y M^i x, we can use the second as if it were the first and generally err only by some small polynomial factor.
But I can't understand how I can obtain a vector annihilated by a matrix if I know the minimal polynomial of the matrix. |
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