Article View: sci.math.symbolic
Article #971Mathematica bug?
From: Peter JB King
Date: Mon, 25 Jan 1993 12:45
Date: Mon, 25 Jan 1993 12:45
33 lines
1570 bytes
1570 bytes
I have found what appears to be some form of bug in Mathematica (
Version 2.1 for SPARC). The following program includes as part of its
output
Simplify`Gamma`Private`SimpGamma1
which appears to be some sort of internal definition. I can find no
mention of SimpGamma1 in the documentation. Intuitively, it looks like
some sort of rule to simplify Gamma fundtions, but it does not appear to
have any arguments. Is the answer I get correct if I replace this by
'1'?
Here is the program that demonstrates the bug.
rstar[s_] := tau / (tau + s )
rbar = 1/tau
b[t_] := mu E^(-mu t )
bstar[s_] := mu / (mu + s )
bbar = 1/mu
pstar[s_] := ( s + gamma ) Integrate[ E^(-(s+gamma)t) b[t] /
(s + gamma(1 - rstar[s](1-E^(-(s+gamma)t)))), { t, 0,
Infinity}]
Print[pstar[s]]
--
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Path: arc1-ca.pugleaf.net!sparky!uunet!pmafire!news.dell.com!natinst.com!cs.utexas.edu!zaphod.mps.ohio-state.edu!howland.reston.ans.net!spool.mu.edu!agate!doc.ic.ac.uk!uknet!edcastle!hwcs!pjbk From: pjbk@cs.hw.ac.uk (Peter JB King) Newsgroups: sci.math.symbolic Subject: Mathematica bug? Message-ID: <1993Jan25.124536.27674@cs.hw.ac.uk> Date: 25 Jan 93 12:45:36 GMT Sender: news@cs.hw.ac.uk (News Administrator) Organization: Dept of Computing & Electrical Engineering, Heriot-Watt University, Scotland Lines: 33