HDTenEightyP/NetNews huggingface dataset:
From: neilfp@astro.ocis.temple.edu (Neil F. Palumbo)
Newsgroups: sci.math.symbolic
Subject: HELP Quadratic Eqns
Date: 9 Jan 93 17:29:11 GMT
Organization: Temple University
X-Newsreader: TIN [version 1.1 PL8]

[ Article crossposted from sci.math ]
[ Author was Neil F. Palumbo (neilfp@astro.ocis.temple.edu) ]
[ Posted on Sat, 9 Jan 1993 17:25:20 GMT ]

I have a set of equations of the form:

			s'*Ai*s + Bi*s + ci = 0, i=1,2,...,100

The unknown is the vector s (the same unknown vector in all 100 eqns).
The Ai's are square (100x100) matrices, the Bi's are (100x1) vectors,
and the ci's are constants. s is of course a (100x1) vector. Can anyone
suggest an approach to simultaneously solving this set of equations? Please
e-mail me with your responses. Thanks in advance...

				Neil
Newsgroups: sci.math.symbolic
From: jbaltz@watsun.cc.columbia.edu (Jerry B Altzman)
Subject: macsyma + OS/2 (WAS: Re: mma + 0s2)
Reply-To: jbaltz@watsun.cc.columbia.edu (Jerry B Altzman)
Organization: mailer daemons association
Distribution: sci
Date: Mon, 11 Jan 1993 14:15:59 GMT

In article <1993Jan11.1589.3696@execnet> "marv kohn" <marv.kohn@execnet.com> writes:
>TN> Is it possible & how do you start a mma-session in os2.
>
>     Mathematica for Windows will not run on the currently shipping
>version of OS/2 (version 2.0).  However, it WILL run on OS/2 v 2.1, which
>is supposed to be released this quarter.  Anyone can get a copy of the OS/2
>2.1 beta on cdrom, directly from IBM, for $15.

Will this all work if we want to run, say, PC Macsyma? I'm much more
interested in that than in MMA, for various reasons (hey, I *like* LISP)

Does anyone out there have experience to maybe coerce macsyma to run under
available OS/2 (i.e. buy it off the shelf tomorrow)? I haven't tried, I'm
still spec-ing hardware and software packages... 

>- Marv Kohn -

//jbaltz
--
jerry b. altzman                                              +1 212 650 5617
jbaltz@columbia.edu                                      jauus@cuvmb (bitnet)
NEVIS::jbaltz (HEPNET)                    ...!rutgers!columbia!jbaltz (bang!)
Newsgroups: sci.math.symbolic,sci.math.num-analysis
From: rcorless@uwovax.uwo.ca
Subject: W(z), where W(z)*exp(W(z)) = z
Organization: University of Western Ont, London
Date: Thu, 7 Jan 1993 19:00:27 GMT

               
A draft version of the paper

                   On Lambert's W Function

by R. M. Corless, D. E. G. Hare, G. H. Gonnet, and D. J. Jeffrey

is now available as the technical report CS-93-03 from the University
of Waterloo. An electronic (postscript) version of the paper is available 
by anonymous ftp to

cs-archive.uwaterloo.ca

in the directory cs-archive/CS-93-03.  The README file asks that
comments be sent to deghare@daisy.uwaterloo.ca, and the paper itself
is stored as W.ps.Z.


This paper should be of interest to any person who has run across the
W function in Maple, and wishes to know more about it.


-- 
======================================================================
Dr. Robert M. Corless              | logic, n. The art of thinking and
Department of Applied Mathematics  |    reasoning in strict accordance
University of Western Ontario      |    with  the  limitations and in-
London, Ontario                    |    capacities of the human misun-
Canada N6A 5B                      |    derstanding.  (Ambrose Bierce)
From: carsten@pizza.fb10.tu-berlin.de (Carsten Schultz)
Newsgroups: sci.math.symbolic
Subject: Re: mma big bad bug
Date: 5 Jan 1993 17:26:45 GMT
Organization: ZRZ/TU-Berlin
Distribution: world
Reply-To: carsten@pizza.fb10.tu-berlin.de (Carsten Schultz)
NNTP-Posting-Host: pizza.fb10.tu-berlin.de

In article <1993Jan5.145612.11165@Arco.COM> jrowney@arco.com writes:
> In article <15326.2b48512a@ohstpy.mps.ohio-state.edu>
> vandesande@ohstpy.mps.ohio-state.edu writes:
> >
> >Here is a bizzarre mma bug.  Try entering:
> >
> >Pi*Sqrt[Pi]/(2*3*Sqrt[2])
> >
> >This is very bad.  If anyone knows what is going on,
> >I would like to hear from them.
> >
> >Brett
> >
> 
> Quite bizarre -- Mathematica just seems to stop dead in its tracks!
> 
> Mac IIfx, MMA 2.102
> 
Let's say it like its is.

Mathematica 2.0 for NeXT
Copyright 1988-91 Wolfram Research, Inc.
 -- NeXT graphics initialized -- 

In[1]:= Pi*Sqrt[Pi]/(2*3*Sqrt[2])

$IterationLimit::itlim: Iteration limit of 4096 exceeded.

                    3
                  Pi
             Sqrt[---]
                   8
Out[1]= Hold[---------]
                 3




Same thing with Mma 2.1. Well, at least the result is correct :-)

Carsten
From: kraai4712@iscsvax.uni.edu
Newsgroups: sci.math.symbolic
Subject: sum(k from f(n) to g(n) of h(n,k))
Date: 4 Jan 93 15:56:47 -0600
Organization: University of Northern Iowa

Hello Symbolic Mathers!

I was wondering which symbolic packages aren't afraid to evaluate,
symbolically, summations whose bounds are functions.

Oh, and are any of those that meet the first criterion able to draw spheres
quickly?

I know these two questions come together sooooo often.

Thanks for your help.  --jim
Newsgroups: sci.math.symbolic
From: rivin@SAIL.Stanford.EDU (Igor Rivin)
Subject: Re: more on mma big bad bug
Organization: Computer Science Department,  Stanford University.
Date: Tue, 12 Jan 1993 22:41:26 GMT

In article <a_rubin.726451074@dn66> a_rubin@dsg4.dse.beckman.com (Arthur Rubin) writes:
>In <15373.2b4c73d5@ohstpy.mps.ohio-state.edu> vandesande@ohstpy.mps.ohio-state.edu writes:
>
>
>>Pi Sqrt[Pi]/(2 2 Sqrt[2])
>
>>The explanation for the "big bad bug" from Wolfram is that 
>>the Simplification rules for Power conflict.  The expression
>>is "simplified" back and forth between two different forms.
>>Will fix in another release, they say.  There is no really 
>>satisfactory fix.
>
>There is a satisfactory fix.  Wolfram just doesn't think so.
>The fix would be to set which automatic simplification is in effect with a
>global variable.

The use of such global variables leads to largely unusable systems
with horrifying semantics (since there is a lot of hidden state at any
given time, which affects your computation in unpredictable ways). In
addition, there is a lot of temptation to use this global switches to
paper over serious bugs, just as you are suggesting here. If you are
unpersuaded, this strategy is one of the major weaknesses in MACSYMA,
so you know where to go and what to do...




Newsgroups: sci.math.symbolic
From: phfrom@nyx.uni-konstanz.de (Hartmut Frommert)
Subject: CAS 4 OS/2 ? (was Re: macsyma + OS/2 (WAS: Re: mma + 0s2))
Keywords: Which CAS's exist for OS/2 ?
Organization: Dept. of Physics, University of Constance
Distribution: sci
Date: Tue, 12 Jan 1993 12:37:03 GMT

Sorry if an Faq, but

  which Computer Algebra systems do currently

  1. Exist for OS/2 2.x (32 Bit)
  2. Run under OS/2-DOS or Win-OS/2 ?
--
 Hartmut Frommert                 <phfrom@nyx.uni-konstanz.de>
 Dept of Physics, Univ of Constance, P.O.Box 55 60, D-W-7750 Konstanz, Germany
                                           -- Eat whale killers, not whales --
From: dlj0@ns1.cc.lehigh.edu (DAVID L. JOHNSON)
Newsgroups: sci.math.symbolic
Subject: starting xmaple with a file included
Date: 12 Jan 93 02:56:33 GMT
Organization: Lehigh University

What I want to do is set up a command that will launch maple in the xmaple
interface (on an rs/6000 - but should be the same for all X boxes) with a
file containing some collection of commands included.

You can do this with non-x maple by:

maple < foo.bar

to load in the file foo.bar.  But, it doesn't work with xmaple.  I want to be
able to do this so my calculus students can avoid entering some of the data
I want them to work with.  I also don't want to have them fight with including
a file from my directories, with a long pathname.

Any ideas?

-- 
Sincerely,

David L. Johnson                    ID:  dlj0@lehigh.edu
Christmas-Saucon Hall #14, rm 241        dlj0@chern.math.lehigh.edu
Department of Mathematics

Lehigh University                   Telephone: 215-758-3759 (office)
From: bill@amber.csd.harris.com (Bill Leonard)
Newsgroups: sci.math.symbolic
Subject: 3D graphing programs
Date: 6 Jan 93 18:23:43 GMT
Organization: Harris CSD, Ft. Lauderdale, FL
NNTP-Posting-Host: amber.ssd.csd.harris.com

I have been wondering what tools are typically used in preparing math
textbooks that contain 3D graphs, such as Multivariable Calculus texts.
Mathematica just doesn't seem to do the job.  What I particularly want is
the ability to graph multiple equations in 3 variables.  The ability to
graph the intersection of such equations, or the solid enclosed by them,
would really be nice.

I know such tools must exist, because I see the results in textbooks all
the time.  Do any exist for the Macintosh or PC?  If so, how do I get them?

Please respond by E-mail.  Thanks in advance.

-- 
Bill Leonard
Harris Computer Systems Division
2101 W. Cypress Creek Road
Fort Lauderdale, FL  33309
bill@ssd.csd.harris.com
---------------------------------------------------------------------------
Prism: A place for light waves that commit minor refractions.
---------------------------------------------------------------------------
Newsgroups: sci.math.symbolic
From: stecher@atlas.socsci.umn.edu (Jack Stecher)
Subject: Compiled Functions in Mma
Organization: Department of Economics, Univ of Minn
Date: Sun, 10 Jan 1993 17:41:27 GMT

I've been trying to use compiled functions in Mma 2.1, and have run into
some difficulties.

First, the difficulty I suspect there isn't a way around:  Does anyone know
if there's a way to use Compile when the arguments are matrices?  Didn't
think so....

Now, for one that just confuses me:  I'm using Mma on a Dec/Ultrix type
station, and don't know where to find the stats routines.  It's easy enough
to write the formula for a normal density, and the normal cdf can be written
using Erf.  I used Newton's method to solve iteratively for a normal quantile
corresponding to a given probability.

When I used uncompiled code for my everything, solving the normal quantile
for .0001 took something like 8 seconds; with compiled code, it took something
like half a second.  But then I loaded a data set to do statistical calcula-
tions on.  The calculations used my compiled code within the routines (I
was computing log-likelihood functions), and were incredibly slow.  Well, after
I finished, I timed the normal quantile for .0001, and it took something like
20 seconds, using compiled code.

Anyone have any clues about where I should look for the problem?

Jack Stecher
stecher@atlas.socsci.umn.edu
--
A government big enough to give you all you want
is big enough to take it all away.
                        --Barry Goldwater
From: whitman@cs.umd.edu (Peter Whitman)
Newsgroups: sci.math.symbolic
Subject: LU factorization in Mma
Date: 5 Jan 93 23:23:03 GMT
Distribution: na
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742

I am looking for a Mathematica function that gives the LU factorization
of a matrix. Specifically, if A is nonsingular, it should return a 
lower triangular matrix L, an upper triangular matrix U, and a permutation
matrix P such that PA = LU. I apologize if I missed finding it in the 
manual. Please reply by email; I will summarize responses.

-- 
Pete Whitman   
whitman@cs.umd.edu
From: mefels@triples.math.mcgill.ca (Mark Fels)
Newsgroups: sci.math.symbolic
Subject: Maple problem
Date: 6 Jan 93 20:09:56 GMT
Distribution: usa
Organization: /etc/organization


Anyone know what's going on here...



simplify(a^2*b^2,{a*b=sqrt(2),a^2=2+sqrt(2),b^2=2-sqrt(2)});

                                       0

Thanks,
Mark Fels.
From: hnr@ecs.soton.ac.uk (Harvey Rutt)
Newsgroups: sci.math.symbolic
Subject: Re: mma big bad bug
Date: 6 Jan 93 16:52:07 GMT

In <1993Jan5.153704.2319@mail.cornell.edu> rz10@cornell.edu (Ray Zimmerman) writes:

>In article <1993Jan5.145612.11165@Arco.COM> , jrowney@arco.com writes:
>>>Here is a bizzarre mma bug.  Try entering:
>>>
>>>Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>>>
>>>This is very bad.  If anyone knows what is going on,
>>>I would like to hear from them.
>>>
>>>Brett
>>>
>>
>>Quite bizarre -- Mathematica just seems to stop dead in its tracks!
>>
>>Mac IIfx, MMA 2.102

>Hmmm, me too!
>Mac IIci, MMA 2.102

Me too!! MMA2.0/Windows 3.1 486PC with 16MB
So its not machine dependant.
Harvey Rutt Sothampton UK



>:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> Ray Zimmerman           \ 397 Theory Center, Electrical Engineering
>                          \ Cornell University, Ithaca NY  14853
> Ray-Zimmerman@cornell.edu \ Phone: 607-254-8819  Fax: 607-255-9072
>:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
>        "The number you have dialed is imaginary.
>                    Rotate phone 90 degrees and try again."
From: me@ienext.unl.edu (Dan Scott)
Newsgroups: sci.math.symbolic
Subject: Re: mma big bad bug
Date: 5 Jan 1993 19:21:03 GMT
Organization: University of Nebraska--Lincoln	
Reply-To: me@ienext.unl.edu
NNTP-Posting-Host: ienext.unl.edu

In article <15326.2b48512a@ohstpy.mps.ohio-state.edu>  
vandesande@ohstpy.mps.ohio-state.edu writes:
> 
> Here is a bizzarre mma bug.  Try entering:
> 
> Pi*Sqrt[Pi]/(2*3*Sqrt[2])
> 
> This is very bad.  If anyone knows what is going on,
> I would like to hear from them.
> 
> Brett

Finally! Here it is, the payoff for not upgrading! :^)

Pi*Sqrt[Pi]/(2*3*Sqrt[2])

    3/2
  Pi
----------
6 Sqrt[2]

Mathematica 1.0 on a NeXTCube '030. (What price progress?)

----------------------------------------------------------------
 Dan Scott   me@ienext.unl.edu     NeXT mail welcome
----------------------------------------------------------------
From: gmmiller@mcs.drexel.edu (Michael R. Miller)
Newsgroups: sci.math.symbolic
Subject: Applied Math - what do YOU do?
Summary: survey of applied mathematicians
Keywords: applied math, visualization, modeling, tools
Date: 8 Jan 93 18:47:03 GMT
Distribution: sci.math.symbolic
Organization: Drexel University

I would like to gather information regarding some of the more 
interesting work done by applied mathematicians in industry and 
in academia.

I am especially interested in users of tools such as Mathematica, 
Maple, Matlab, et. al. in visualization, modeling, and data analysis work.

I welcome all responses, but am curious about the following areas:
     medical research
     image processing (esp. fractals)
     space, aeronautics
     weather forecasting
     physics (esp. lasers)
     signal processing
     information theory

Please e-mail your responses (short or long!) directly to me 
(gmmiller@mcs.drexel.edu).  The survey is for my own use (academic and 
career guidance).  If the responses warrant it, I will summarize and 
post the results.

If you love your job, here's a chance to brag about it!    :)

Thanks very much -- and happy 1993!

Mike Miller
(gmmiller@mcs.drexel.edu)
Newsgroups: sci.math.symbolic
From: fast@escher.colorado.edu (Bruce Alan Fast)
Subject: mma big bad bug
Summary: the loop
Organization: University of Colorado, Boulder
Date: Fri, 8 Jan 1993 00:12:16 GMT

To get the first 25 steps of Mma calculations when it works on
the (Pi/2)^(3/2)/3 bug,

In[3]:= loop = Trace[(Pi/2)^(3/2)/3][[Range[25]]];

$IterationLimit::itlim: Iteration limit of 4096 exceeded.
...etc.

Starting with the 4th element of 'loop' this three-fold cycle occurs
for loop[[n]]:
			     Pi 3/2
			    (--)
			     2		(n mod 3 = 1)
			    -------
			       3	

			/		  \
		       /		   \
		      /			    \
		     /      the loop.        \
		    +			      \
(n mod 3 = 0)
					              3
	        3			            Pi
	      Pi     Pi 3/2		       Sqrt[---]       (n mod 3 = 2)
	{Sqrt[---], (--)   }     <-------            8
	       8     2			       ---------
					           3


loop[[4]] = HoldForm[Times[
	Power[Times[Pi, Power[2, -1]], Times[3, Power[2, -1]]],
	Power[3, -1]
	]]

loop[[5]] = HoldForm[Times[
	Power[Times[Power[Pi, 3], Power[8, -1]], Times[1, Power[2, -1]]],
	Power[3, -1]
	]]

It's clear that there is a conflict between two ideas of 'Simplification'
which bounces the expression between the two forms.  Someone (who knows more
details of Mma simplification rules for Power & Times) please tell us what's
happening.  Thanks.
Newsgroups: sci.math.symbolic
From: nfytn@alf.uib.no (Tore Nordstrand)
Subject: mma + 0s2 
Organization: University of Bergen, Norway
Date: Fri, 8 Jan 93 13:19:21 GMT


 Is it possible & how do you start a mma-session in os2.

  thx

 tore@maxwell.fi.uib.no
Newsgroups: sci.math.symbolic
From: mrs@mhtl1.UWaterloo.ca (M. R. Sridhar)
Subject: Re: mma big bad bug
Organization: University of Waterloo, Waterloo Ontario
Date: Wed, 6 Jan 1993 23:44:07 GMT

In article <wmcb-060193124719@lynx.math.appstate.edu> wmcb@math.appstate.edu (Bill Bauldry) writes:
>In article <14073@ecs.soton.ac.uk>, hnr@ecs.soton.ac.uk (Harvey Rutt)
>wrote:
>> 
>> In <1993Jan5.153704.2319@mail.cornell.edu> rz10@cornell.edu (Ray Zimmerman) writes:
>> 
>> >In article <1993Jan5.145612.11165@Arco.COM> , jrowney@arco.com writes:
>> >>>Here is a bizzarre mma bug.  Try entering:
>> >>>
>> >>>Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>> >>>
>> >>>This is very bad.  If anyone knows what is going on,
>> >>>I would like to hear from them.
>> >>>
>> >>>Brett
>> >>>
>> >>
>> >>Quite bizarre -- Mathematica just seems to stop dead in its tracks!
>> >>
>> >>Mac IIfx, MMA 2.102
>> 
>> >Hmmm, me too!
>> >Mac IIci, MMA 2.102
>> 
>> Me too!! MMA2.0/Windows 3.1 486PC with 16MB
>> So its not machine dependant.
>
>Definitely not machine dependent! Here's a session from a Convex (courtesy
>of tga@math.appstate)
>
>In[2]:= Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>
>Interrupt> **after one minute**
>??
>Your options are:
>        abort (or a) to abort current calculation
>        continue (or c) to continue
>        exit (or quit) to exit Mathematica
>        inspect (or i) to enter an interactive dialog
>        show (or s) to show current operation (and then continue)
>        trace (or t) to show all operations
>
>Interrupt> a
>
>
>WARNING: disk quota (/cardinal/edu) exceeded
>
>DISK LIMIT REACHED (/cardinal/edu) - WRITE FAILED
>Bus error (core dumped)
>
>---
>Just how much did it cost for this *upgrade* ?
>
>+=======================+===============================+
>     Bill Bauldry       |   wmcb@math.appstate.edu
>    Math. Sciences      | wmcb@lynx.math.appstate.edu
>  Appalachian State U   |  BauldryWC@appstate.bitnet
>   Boone, NC   28608    |       (704) 262-2355
>+=======================+===============================+
>When judging a mathematician you should only integrate f_+
>and ignore f_-
>- A Zygmund

I tried out the bug and it worked fine. The problem is that if you
do not use a period at the end of the numericals it goes into an 
infinite loop. Hope this helps.


In[3]:= bug = Pi*Sqrt[Pi]/(2.*3.*Sqrt[2.])

Out[3]= 0.1178511301977579*Pi^(3/2)

In[4]:= CloseLog[]


Sridhar

e-mail: mrs@mhtl.uwaterloo.ca
Newsgroups: sci.math.symbolic
From: dhart@bronze.ucs.indiana.edu (Dave Hart)
Subject: Parallel version of Maple?
Organization: Indiana University
Date: Thu, 7 Jan 1993 17:58:28 GMT

	I seem to recall something about a parallel version of Maple,
a few monthes ago... and can't find it now.  Any pointers would be 
greatly appreciated.

Newsgroups: sci.math.symbolic
From: kogeddes@daisy.uwaterloo.ca (Keith O. Geddes)
Subject: Re: Book "Algorithms for Computer Algebra" Authors
Organization: University of Waterloo
Date: Mon, 4 Jan 1993 14:57:51 GMT

In article <JAFFER.93Jan3223634@camelot.ai.mit.edu> jaffer@zurich.ai.mit.edu (Aubrey Jaffer) writes:
>I have found some minor errors in "Algorithms for Computer Algebra".
>What are the email adresses of the authors (Keith O. Geddes, Stephen
>R. Czapor, and George Labahn)?

They are:

	Keith Geddes	kogeddes@daisy.uwaterloo.ca
	Stephen Czapor	steve@ramsey.cs.laurentian.ca
	George Labahn	glabahn@daisy.uwaterloo.ca

Professor Keith Geddes
Director, Symbolic Computation Group
Department of Computer Science
University of Waterloo
Waterloo, Ontario
Canada N2L 3G1                     kogeddes@daisy.uwaterloo.ca
From: cohen@alioth.greco-prog.fr (Henri Cohen)
Newsgroups: sci.math.symbolic
Subject: Re: Book "Algorithms for Computer Algebra" Authors
Date: 4 Jan 93 11:55:41 GMT
Reply-To: cohen@alioth.greco-prog.fr (Henri Cohen)
Organization: ceremab

In article <JAFFER.93Jan3223634@camelot.ai.mit.edu>,
jaffer@zurich.ai.mit.edu (Aubrey Jaffer) writes:
|> I have found some minor errors in "Algorithms for Computer Algebra".
|> What are the email adresses of the authors (Keith O. Geddes, Stephen
|> R. Czapor, and George Labahn)?

Would you care to share them with the Net, or are they so minor
that they do not really matter if one wants to use the algorithms
given in the book?
Newsgroups: sci.math.symbolic
From: siegl@risc.uni-linz.ac.at (Kurt Siegl)
Subject: Re: Parallel version of Maple?
Organization: RISC, J.K. University of Linz, Austria
Date: Fri, 8 Jan 1993 08:27:21 GMT

In article <C0HwLH.I0I@usenet.ucs.indiana.edu>, dhart@bronze.ucs.indiana.edu (Dave Hart) writes:
> 	I seem to recall something about a parallel version of Maple,
> a few monthes ago... and can't find it now.  Any pointers would be
> greatly appreciated.
> 

I'm the one who developed a parallel version of Maple (||MAPLE||).
For all who are interrested in that work, here is the posting by myself from November
again.

||MAPLE|| is a portable Computer Algebra system in which logic programming provides
parallelism and imperative programming provides efficiency. The system is
built as a combination between the parallel declarative programming language
Strand and the sequential computer algebra system Maple.

Programming in that system is done in two layers.
The top (parallel, declarative) layer is Strand from where one may call Maple functions
to perform the time critical sequential parts. Due to that design ||MAPLE|| programs
are binary compatible among every hardware and independend of the number of processors.

There are also predefined generic parallel functions available, that alow nearly automatic
parallelization of algorithms used in Computer Algebra. Maple's Real Root isolation proc.
for example has been parallelized by changing 5 lines in the source using that feature.

A parallelized user interface alows subsequently entering querys without waiting for
the availability of the previous result. Data dependencies are automaticaly
resolved by the system.

||MAPLE|| currently runs on Sequent shared memory machines, Transputer distributive
memory machines and on Networks of SUN Workstations.

Feel free to contact siegl@risc.uni-linz.ac.at for further information.

Kurt

----------------------------------------------------------
You can tell how far we have to go, when FORTRAN is the language of
supercomputers.    -- Steven Feiner
----------------------------------------------------------
Kurt Siegl / RISC, University of Linz, Austria
email: siegl@risc.uni-linz.ac.at
Tel:   *(7236)3231-66      Fax: *(7236)3231-30
Newsgroups: sci.math.symbolic
From: peter@beast.math.ualberta.ca (Peter Karbaliotis)
Subject: Re: mma big bad bug
Organization: University Of Alberta, Edmonton Canada
Date: Tue, 5 Jan 1993 17:34:57 GMT

In article <1993Jan5.161908.29218@nas.nasa.gov> hook@wilbur.nas.nasa.gov  
(Edward C. Hook) writes:
>In article <15326.2b48512a@ohstpy.mps.ohio-state.edu>  
vandesande@ohstpy.mps.ohio-state.edu writes:
>>
>>Here is a bizzarre mma bug.  Try entering:
>>
>>Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>>
>>This is very bad.  If anyone knows what is going on,
>>I would like to hear from them.
>>
>>Brett
>
>For what it's worth, here's what happens on one of our big SGI machines:
>
>Script started on Tue Jan  5 08:07:35 1993
>wilbur.hook: 101> math
>Mathematica 2.0 for SGI Iris
>Copyright 1988-91 Wolfram Research, Inc.
> -- X11 windows graphics initialized -- 
>
>In[1]:= Pi*Sqrt[Pi]/(2*3*Sqrt[2])
>
>$IterationLimit::itlim: Iteration limit of 4096 exceeded.
>
>                    3
>                  Pi
>             Sqrt[---]
>                   8
>Out[1]= Hold[---------]
>                 3
>

Ditto on my NeXTstation running NeXTSTEP 3.0 and Mma 2.1

--
Peter Karbaliotis - peter@beast.math.ualberta.ca - NeXTmail ok
When a particle you don't even know gives you momentum, that's impulse.
Newsgroups: sci.math.symbolic