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From: rrd@hpfinote.HP.COM (Ray Depew x2419)
Newsgroups: comp.sys.handhelds
Subject: Re: Question - Indefinite Integration
Message-ID: <19080015@hpfinote.HP.COM>
Date: 28 Sep 90 17:47:29 GMT
References: <24605@uflorida.cis.ufl.EDU>
Organization: Hewlett Packard CICD
Lines: 24

> Ok, forgive the novice question, but we all started with our
> first HP at one point...  Is there a way to evaluate
> an integral sans limits on the 48SX?

> John  M.  Adams    --**--    Professional Student on the six-year plan!

Two solutions:

1)  Fake it, by setting the limits at -MAXR and MAXR.   MAXR (MaxReal) is 
    the largest number the 48 will handle.  If you're curious to see what 
    MAXR is, press MAXR  ->NUM  and you will see 9.999999999999E499 on
    Level 1.

2)  Wlodek M-J, in his massive work on the HP-41, had a beautiful workaround
    for indefinite integrals.  I gave the book to someone else (darn it!), 
    so I don't remember what it was.  But it was an elegant mathematical
    manipulation, and I used it several times on my 41.  Perhaps someone else
    with the book would be good enough to post it here for our benefit?


Regards
Ray Depew
HP Colorado IC Division 
rrd@hpfitst1.hp.com