Re: high-precision eigenvalue solver

In article <1134445756.579662.272340@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
<wakun@xxxxxxxxx> wrote:
>
>> Try Maple, which can give you arbitrary precision. Of course it will
>> be slower.
>>
>> Robert Israel israel@xxxxxxxxxxx
>> Department of Mathematics http://www.math.ubc.ca/~israel
>> University of British Columbia Vancouver, BC, Canada
>I try ang it improves the result a little bit. However, it still not
>accurate enough. I guess it's due to the QR/QZ algorithm. Does anyone
>know what the order of QR/QZ algorithm is? Someone told me to try
>fourth-order diagonalization algorithm, any idea?

Did you try increasing Digits? Can you tell us the matrix?

Robert Israel israel@xxxxxxxxxxx
Department of Mathematics http://www.math.ubc.ca/~israel
University of British Columbia Vancouver, BC, Canada


.

Quantcast