Re: StruveH runtime error

*To*: mathgroup at smc.vnet.net*Subject*: [mg45721] Re: StruveH runtime error*From*: Paul Abbott <paul at physics.uwa.edu.au>*Date*: Wed, 21 Jan 2004 04:55:04 -0500 (EST)*Organization*: The University of Western Australia*References*: <buap11$mim$1@smc.vnet.net> <bugb60$gme$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

In article <bugb60$gme$1 at smc.vnet.net>, "Alan" <infoNOSPAM at optioncity.net> wrote: > > I am having troubles in evaluating StruveH functions. > > > > StruveH[1,10^4]=0.643716 > > took 278356 sec on P4, 2.8GHz (HDD 120GB, 1024MB PC3200 RAM) Win XP SP1 > > machine with Mathematica v.5.0. > > It took really long time. But the value could be evaluated. > > > > However, > > StruveH[1,10^5] > > could not be evaluated, because the session was terminated with a Windows > > error message > > Abramowitz & Stegun says: > > StruveH[1, z] ~ BesselY[1,z] + (2/Pi)(1 + 1/z^2 - 3/z^4 + 45/z^6 + > O(1/z^8)) I am suprised that I cannot find this asymptotic series representation at http://functions.wolfram.com/BesselAiryStruveFunctions/StruveH Cheers, Paul -- Paul Abbott Phone: +61 8 9380 2734 School of Physics, M013 Fax: +61 8 9380 1014 The University of Western Australia (CRICOS Provider No 00126G) 35 Stirling Highway Crawley WA 6009 mailto:paul at physics.uwa.edu.au AUSTRALIA http://physics.uwa.edu.au/~paul