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Re: Chebyshev approximation to grid points
- From: "Robert G. Brown" <rgb at phy dot duke dot edu>
- To: Jochen Küpper <jochen at jochen-kuepper dot de>
- Cc: gsl-discuss at sources dot redhat dot com,pygsl ml <pygsl-discuss at lists dot sourceforge dot net>
- Date: Tue, 17 Jun 2003 11:31:18 -0400 (EDT)
- Subject: Re: Chebyshev approximation to grid points
On Tue, 17 Jun 2003, Jochen Küpper wrote:
> Do you know other/better (or easier to get) literature?
My recollection is that this is in Forsythe, Malcom and Moler's book,
which is a classic. However, my copy is loaned out to a student at the
moment and I cannot check.
FMM is in Fortran, but a) I don't recall it being attached with nasty
licenses and b) it is written so cleanly that I've never had any
difficulty porting its routines into C. The algorithms are
straightforward.
I did a bunch of stuff some years ago with Gauss-Legendre and
Gauss-Chebyshev quadrature, which is basically just fitting the
polynomial and integrating the fit (IIRC).
FMM appears to be available, used, via amazon. I'd nail it if I were
you.
rgb
>
> Thank you in advance.
>
> Greetings,
> Jochen
>
--
Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb@phy.duke.edu