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eigenval / EIGENVALUES
06-03-2015, 06:24 PM
Post: #3
RE: eigenval / EIGENVALUES
Very interesting, you have found an example of matrix that enter an infinite loop when applying Francis numeric algorithm with 2 real shifts (the loop is infinite because the matrix is already in Hessenberg form and the shifts are exact integers). Introducing a small rounding error breaks the infinite loop, I'm updating the giac source code to do that.
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Messages In This Thread
eigenval / EIGENVALUES - salvomic - 06-02-2015, 09:50 PM
RE: eigenval / EIGENVALUES - Archanus - 06-03-2015, 01:49 AM
RE: eigenval / EIGENVALUES - parisse - 06-03-2015 06:24 PM
RE: eigenval / EIGENVALUES - salvomic - 06-03-2015, 06:58 PM
RE: eigenval / EIGENVALUES - Hlib - 06-04-2015, 08:37 PM
RE: eigenval / EIGENVALUES - salvomic - 06-04-2015, 09:06 PM
RE: eigenval / EIGENVALUES - Hlib - 06-04-2015, 10:08 PM



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