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From: khb@fatcity.Sun.COM (Keith Bierman Sun Tactical Engineering)
Newsgroups: comp.lang.fortran
Subject: Re: Responses to M. Shapiro & K. Bierma
Message-ID: <101940@sun.Eng.Sun.COM>
Date: 29 Apr 89 01:48:23 GMT
References: <24091@beta.lanl.gov> <50500126@uxe.cso.uiuc.edu>
Sender: news@sun.Eng.Sun.COM
Reply-To: khb@sun.UUCP (Keith Bierman Sun Tactical Engineering)
Organization: Sun Microsystems, Mountain View
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In article <50500126@uxe.cso.uiuc.edu> mcdonald@uxe.cso.uiuc.edu writes:
>
>

>One cannot quibble with "Those folks really, really benefit from 
>good libraries." Pray tell me, where can I find some of these? 

IMSL and NAG are famous commercial libraries. QTC is good for those
porting codes to/from array processors (but lacking in real math).
NASA has several interesting libraries, JPL's MATH77LIB among others.
BCSlib is quite good, and I can point those interested to a Kalman
filter library. 

>The only commercial or common public domain library routines I have
>found optimal for my use are the routines "tred2" and "tql2" from the
>EISPAC library. Can anyone recommend a library routine for integrating
>differential equations of the sort I use that is better than the 
>sixth order hybrid Gear fixed step size integrator I now use?

Hopefully someone more involved with integration techniques can say
something sensible. From a performance standpoint, EISPAC is very far
from optimal.


Keith H. Bierman      |*My thoughts are my own. Only my work belongs to Sun*
It's Not My Fault     |	Marketing Technical Specialist 
I Voted for Bill &    |   Languages and Performance Tools. 
Opus            (* strange as it may seem, I do more engineering now     *)