Messages in this thread |  | | Subject | Re: Fwd: Copyright infringement in linux/drivers/usb/serial/keyspan*fw.h | From | Andreas Jaeger <> | Date | 25 May 2001 09:02:01 +0200 |
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Aaron Lehmann <aaronl@vitelus.com> writes:
> On Fri, May 25, 2001 at 02:34:05AM -0400, Alexander Viro wrote: > > Should we file bug reports against glibc? > > invsqrtpi= 5.64189583547756279280e-01 > Inverted square root of pi. Want to file a bug on Pi? > > tpi = 6.36619772367581382433e-01, > R0/S0 on [0, 2.00] > > I'm not sure what R and S are, but the glibc developers probably are.
We have comments in the code that state how j0 is build, and R0/S0 come from some expansion: * Bessel function of the first and second kinds of order zero. * Method -- j0(x): * 1. For tiny x, we use j0(x) = 1 - x^2/4 + x^4/64 - ... * 2. Reduce x to |x| since j0(x)=j0(-x), and * for x in (0,2) * j0(x) = 1-z/4+ z^2*R0/S0, where z = x*x; * (precision: |j0-1+z/4-z^2R0/S0 |<2**-63.67 )
Andreas -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.inka.de http://www.suse.de/~aj - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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