HDTenEightyP/NetNews huggingface dataset:
From: mcba@newt.phys.unsw.edu.au (Michael C. B. Ashley)
Newsgroups: sci.math.symbolic
Subject: Mathematica machineID problem
Keywords: Mathematica password
Date: 14 Sep 92 23:52:59 GMT
Organization: University of New South Wales

Hi folks,

I have a major problem with Mathematica that is preventing me from using
it easily. When I run the "mathinfo" program to obtain my machineID, I
get one of two different numbers returned (2406-58617-78759 or
2306-58617-78759). Wolfram Research have given me the password for one
of these numbers but not the other. Sometimes I have to try 30 or more
times to start up Mathematica before the right number comes up.

I think that I am right in guessing the following
  
  (1) All I need is another password in my "mathpass" file that matches
      the other "machineID".
  (2) The programmers who developed the security mechanisms for
      Mathematica are entirely incompetent.

Sorry if I sound a bit jaded, but I have been trying to get some help
from Wolfram Research about this problem without any luck. Specifically,
I sent them faxes on August 13, August 17, August 24, and September 3
concerning this problem, and have not had a reply. I also e-mailed
register@wri.com on September 14 and have not had a reply.

It seems that having spent $2500 on Mathematica, and $375 on a
subscription to Mathematica Plus, that Wolfram Research has delivered
defective software that it refuses to fix. I have no objections to
paying a reasonable price for good software, but object strenuously when
I have a valid licence and the manufacturer's faulty security code stops
me from using it. I have been teaching an undergraduate course in
Classical Mechanics based partly on Mathematica, and now I find that I
have to rewrite large sections since Mathematica is no longer usable.

I would certainly caution against anyone buying Mathematica and relying
on it being available. 

Two other quick points while I'm here:
  (1) How many more years will we have to wait before Mathematica comes
      with a decent X11 interface?
  (2) The line-mode Mathematica interface is extraordinarily primitive.
      Why can't we have a simple history editing feature using the arrow
      keys (c.f. "tcsh" and numerous other UNIX programs).

Finally, can anyone suggest an alternative to Mathematica? I would only
consider those for which the supplier has an enlightened attitude to
security and licensing, and who will respond to faxes and e-mail.

I would be interested in hearing if other people have had similar
problems with "machineID". Incidentally, my machine is a DECstation
5000/200 running Mathematica 2.0.3.

Yours sincerely,
Michael Ashley (Lecturer in Physics, University of New South Wales,
Sydney Australia) mcba@newt.phys.unsw.edu.au
Newsgroups: sci.math.symbolic
From: saxena@cs.albany.edu (Tushar Saxena)
Subject: Re: Maple differntiation
Originator: saxena@tarski.albany.edu
Organization: The University at Albany, Comp. Sci. Dept.
Date: Wed, 9 Sep 1992 14:55:29 GMT

In article <1992Sep9.123145.6802@uwm.edu> litow@csd4.csd.uwm.edu (Bruce E Litow) writes:
>Maple V does this
>
>> diff(xy,y);
>> 0
>This is clearly a bug.

Look before you jump. xy is a variable but x*y an expression.

>-- 
>Bruce Litow
>Computing Services Division
>P.O.Box 413, University of Wisconsin-Milwaukee, 53201
>414 229 6431    litow@csd4.csd.uwm.edu

ttfn
	-Tush.

--------------------------------------------------------------------------------
And any fool knows a dog needs a home, A shelter from pigs on the wing.
        -Roger Waters
--------------------------------------------------------------------------------
email : saxena@cs.albany.edu                        Computer Science Department
Phone : 518-442-3388				    SUNY Albany
Tushar Saxena					    Albany NY 12222 (USA)
--------------------------------------------------------------------------------
Newsgroups: sci.math.symbolic
From: maeder@inf.ethz.ch (Roman Maeder)
Subject: Re: Mma Koch Snowflake in Not. of AMS
Reply-To: maeder@inf.ethz.ch (Roman Maeder)
Organization: Theoretical Computer Science, ETH Zurich
Date: Tue, 15 Sep 1992 07:44:47 GMT

      It appears that I either copied this program incorrectly,
      there was a typo in the publication (please see comment below),
      or the program is not correct.

      According to the 1991 version (2nd edition) of Wolfram's
      Mathematica book, FixedPoint does not allow multiple arguments.

there is a comma at the end of the argument list of FixedPoint,
giving it an addition Null argument.

KochSnowflake[n_Integer?NonNegative]:=
  Show[Graphics[FixedPoint[
  (#1/.Line[{start_,finish_}]
  :>doline[start,finish]) &,
  {Line[{{0,0},{1/2,Sqrt[3]/2}}],
  Line[{{1/2,Sqrt[3]/2},{1,0}}],
  Line[{{1,0},{0,0}}]},
  n,]],
  AspectRatio->Automatic,PlotRange->All]

it should read

KochSnowflake[n_Integer?NonNegative]:=
  Show[Graphics[FixedPoint[
  (#1/.Line[{start_,finish_}]
  :>doline[start,finish]) &,
  {Line[{{0,0},{1/2,Sqrt[3]/2}}],
  Line[{{1/2,Sqrt[3]/2},{1,0}}],
  Line[{{1,0},{0,0}}]},
  n]],
  AspectRatio->Automatic,PlotRange->All]

A minor stylistic point: Since you are not really computing the fixed-point,
but stopping after n iteration, I would suggest to use Nest[] instead
of FixedPoint[] (same calling sequence)

Here's the whole program again:

(*  program for a Koch snowflake.  found in the Notices
    of the AMS Vol.39 #7 Sept 92, page 709    *)

KochSnowflake[n_Integer?NonNegative]:=
  Show[Graphics[
    Nest[ (#1/.Line[{start_,finish_}] :>doline[start,finish]) &,
          {Line[{{0,0},{1/2,Sqrt[3]/2}}],
           Line[{{1/2,Sqrt[3]/2},{1,0}}],
           Line[{{1,0},{0,0}}]},
          n]],
   AspectRatio->Automatic,PlotRange->All]

doline[start_,finish_]:=
  Module[{vec,normal},
  vec=finish-start;
  normal=Reverse[vec] {-1,1} Sqrt[3]/6;
  {Line[{start,start + vec/3}],
  Line[{start + vec/3,start + vec/2 + normal}],
  Line[{start + vec/2 + normal, start + 2 vec/3}],
  Line[{start + 2 vec/3, finish}]
  }
  ]


Roman Maeder
Theoretical Computer Science
ETH Zentrum, IFW
8092 Zurich
Switzerland
Newsgroups: sci.math.symbolic
From: massari@ghost.dsi.unimi.it (gianmario massari)
Subject: Mathematica Editing Function
Organization: Computer Science Dep. - Milan University
Date: Mon, 14 Sep 1992 15:43:28 GMT


Hi there,

	I'm looking for a program about symbolic analysis (semantic and sintattic).

		I would like to know if noone has got C-program which could 
write strings from horizontal format (x^2) to vertical format in this way:

                              2
		X^2  ---->  X
	

I know Mathematica has got a such function.  My problem is about the symbol "/" (division)
and the function Power(argoument,exponent) and Root(argoument,exponent).

I have to support the possibility to describe a n-argouments function (which wont be 
further elaborate) in this math-editing function.


Anyone has news and ideas about this editing function and Syntattic-Semantic Interpeter?


				Thanks in advance


				massari@ghost.sm.dsi.unimi.it
From: stiv@stat.rice.edu (david n stivers)
Newsgroups: sci.math.symbolic
Subject: pc applications other than Mma or Maple (for IBM or Apple)
Date: 10 Sep 92 14:29:20 GMT
Organization: Dept. of Statistics, Rice University

Are there any other packages available? 

Are they any better than these?o

Thank for any replies,
David

-- 

david n stivers stiv@rice.edu
From: nziring@afterlife.ncsc.mil (Neal Ziring)
Newsgroups: sci.math.symbolic
Subject: Mathematica tutorial?
Date: 10 Sep 92 14:50:59 GMT
Distribution: usa
Organization: The Great Beyond


	Does anybody out there have an on-line textual tutorial for
Mathematica?  My officemate is a blind mathematician who would like
to use Mma but he cannot just sit down and read Wolfram's book.

If anyone has an intro or tutorial or overview of Mma in text, RTF, 
troff, texinfo, or other electronic human-readable forms, please email
me at nziring@afterlife.ncsc.mil

Thanks in advance...
-- 
...nziring  (Neal Ziring  @  Afterlife, Nat'l Computer Security Center)
INFOSEC Evaluations Technology Division - "If you want it done bad,
					   this is the place!"
From: harris@strauss.cs.unc.edu (Trey Harris)
Newsgroups: sci.math.symbolic
Subject: Cross Products with Mathematica?
Date: 16 Sep 92 01:46:19 GMT
Organization: The University of North Carolina at Chapel Hill

How would one compute a vector (cross) product with Mathematica?
It is such an elementary function that one would think it would be
included among the basic functions in the package.  However, were one
to input an expression such as:

{1,0,0} {0,1,0}

It does not return the vector products of the vectors i and j, k, but
rather the zero vector.

It is trivial to design a function that will compute these, but it does
seem odd that such a simple function would not be included in the usual
function set.

(I must admit that I am only just learning Mathematica, but yet I don't
see mention of this in the books I have researched.)

Trey Harris
Newsgroups: sci.math.symbolic
From: coates@newton.physics.uq.oz.au (Tony Coates)
Subject: Re: Mathematica: Mac --> PC?
Organization: Physics Dept. The University of Queensland
Date: Wed, 9 Sep 1992 01:10:55 GMT

In my previous post, I didn't mention how I transferred the Mma files
from the Mac to the PC - I used "sneakernet", i.e. Apple File Exchange
(using "Text Translation") to put the files on a PC disk, and then just
walked it home from there.
							Tony.
_______________________________________________________________________________

Anthony.B.Coates (Tony)
Department of Physics
The University of Queensland  QLD  4072
Australia

Phone: (+617)365 3424           (Physics Departmental Office)
Fax:   (+617)365 1242           (   "         "         "   )
Email: coates@physics.uq.oz.au

"My messages mirror my feelings, but do not reflect University policy."
_______________________________________________________________________________
Newsgroups: sci.math.symbolic
From: phys58@jetson.uh.edu (Hortvet, Douglas Richard)
Subject: Plot 3D and Plot 4D
News-Software: VAX/VMS VNEWS 1.41    
Organization: University of Houston
Distribution: usa
Date: Fri, 11 Sep 1992 13:28:00 GMT

Are there any users of Plot 3D or Plot 4D that can offer their comments on the 
capabilities of these programs, ease of use, etc. What firm markets this 
software? Please advise an address or phone number.

					Thanks,




					Douglas Hortvet 
Newsgroups: sci.math.symbolic
From: butscher@aurora.physics.utoronto.ca (Adrian Butscher)
Subject: MMA Student version
Organization: University of Toronto Physics/Astronomy/CITA
Date: Thu, 10 Sep 1992 20:45:05 GMT

I'm interested in knowing about the Student version of MMA for the
Macintosh also.  What kind of computers it run on, what are its 
limitations, is it a good buy, how much should I expect to pay for it?

Please post your replies.

Adrian
From: acar@ee.umr.edu
Newsgroups: sci.math.symbolic
Subject: 3D parametric graphs? --- Correction
Date: 14 Sep 92 18:26:20 GMT
Reply-To: acar@ee.umr.edu
Organization: University of Missouri-Rolla

The currect version of my question is as follows:

Is there a way to have Mathematica draw a 3D parametric graph?

I have three equations which depend on two parameters.
I would like to get a surface graph of these equations. I checked
Graphics/Shape.m package, but it is too complicated (for me)
to understand what is going on. Moreover, I am not sure if I
can use some of the undocumented functions, like MakeShape,
used in that package.

Thank you for your interest.

******************************************************************
L. Acar				| acar@ee.umr.edu
Univ. of Missouri-Rolla		| 
******************************************************************
Newsgroups: sci.math.symbolic
From: acar@ee.umr.edu
Subject: Thanks (3D parametric graphs? --- Correction)
Date: Mon, 14 Sep 1992 23:13:32 GMT
Reply-To: acar@ee.umr.edu
Organization: University of Missouri-Rolla

Thanks to P. Wang from Kent University and Kelly Roach from WRI
for answering. (I guessed the names and organizations from their
email addresses, I hope they are correct.)

I ended up using something similar to Kelly Roach's code which
uses Table, Flatten, Polygon, Graphics3D and Show. It was quite
refreshing to figure out what was going on, but I guess that's
one way to (re)learn.

******************************************************************
L. Acar				| acar@ee.umr.edu
Univ. of Missouri-Rolla		| 
******************************************************************
From: schreib@apap4.pap.univie.ac.at
Newsgroups: sci.math.symbolic
Subject: 3D-Surface with contour lines in MMA
Date: 8 Sep 92 10:00:43 GMT
Organization: Vienna University Computer Center


Dear net-users,

Is there a way in MMA to create 3D-plots with stacked contour lines?

                            Erich

Erich Schreiber
schreib@pap.univie.ac.at

Newsgroups: sci.math.symbolic
From: vermaser@cern.ch (Josef Vermaseren)
Subject: Re: MPP implementations of symbolic algebra systems
Organization: CERN European Lab for Particle Physics
Date: Sat, 5 Sep 1992 15:00:31 GMT

In article <5!lngnc@lynx.unm.edu> john@aquarius.unm.edu (John Prentice) writes:
> Anyone know if people are working on implementations of symbolic algebra
> systems on massively parallel supercomputers?  If so, what precisely is
> being parallelized?  
> 
I have been experimenting with putting FORM on the ACP/MAPS machine at
Fermilab. At the time I did this the machine had 258 processors. We got
it to run some moderately complex problem at a speed of more than 100 times
the speed of a single processor. The fun part was that 
1:  the whole program FORM parallellizes.
2:  there is only one bottleneck.
3:  the more complicated the problem, the better it works.
    We ran a simple program and then it could keep only 6 processors going,
    because by the time it was dishing out the 7-th step in a giant tree
    the first processor would be available again.
The special property of this machine is that the processors can get at each
others memory rather quickly, so transferring part of a problem to another
processor is rather fast. So expanding trees can be spread out very quickly,
provided that the 'environment' that comes along doesn't contain too many
pointers. With FORM there are hardly any. The crunch comes of course when
all the results have to be put together. That is a variation on a sorting
algorithm and actually it is an inverse tree. So most effort should go into
making the last stap in that inverse tree as insignificant as possible and
definitely as fast as possible.

The project isn't quite finished yet, and will probably be continued some time
next year. By now the machine has even more and faster processors so it should
be fun.

Jos Vermaseren
Newsgroups: sci.math.symbolic
From: ethanb@ptolemy.astro.washington.edu (Ethan Bradford)
Subject: Theorist: Anybody had FirstProp error on write?
Organization: U. of Washington
Date: Tue, 15 Sep 1992 05:49:22 GMT

Sometimes when I try to write a file, Theorist crashes with a
FirstProp error and trashes my copy of the file on the disk.  Needless
to say, this is very distressing.  It only seems to happen on files
which are at least 12K, but I often work successfully with much larger
files.

Has anybody else got this error?  Anybody know what causes it and how
it can be avoided?  Anybody know how to make the corrupted file
readable by Theorist?  Technical support at Prescience has been unable
to do much for me on this.

Thanks.

-- Ethan
--
-- Ethan (ethanb@u.washington.edu)
Newsgroups: sci.math.symbolic
From: hibrown@thor.albany.edu (Herb Brown)
Subject: Re: A problem with Maple integration ..
Organization: State University of New York at Albany
Distribution: sci
Date: Sun, 13 Sep 92 12:53:16 GMT

In article <1992Sep12.160849.14864@vax5.cit.cornell.edu> fnvy@vax5.cit.cornell.edu writes:
>Possible Maple error in integration
>
>This is what I did with xmaple (Maple V) on a sparc station:
>
>> f:=sqrt((1+s)/(1-s));
>                                            1/2
>                                     (1 + s)
>                                f := ----------
>                                            1/2
>                                     (1 - s)
>
>_____________________________________________________________________________
>> int(f*s,s=-1..1,continuous);
>                                    - 1/2 Pi
>
>Whereas the correct answer should be 
>
>               Pi/2
>
>Did I do something wrong?  Or, is this a bug on the current version Maple?
>All discussion or advice are welcome.  Many thanks for your attention.
>
>Wei-Yan
>

Perhaps the following may help understand what Maple is attempting to do:


> F := int( x*sqrt((1 + x)/(1 - x)), x);

                               2 1/2                         2 1/2
              F := 1/2 x (1 - x )    - 1/2 arcsin(x) + (1 - x )

> subs( x = 1, F) - subs( x = -1, F);

                    ans := - 1/2 arcsin(1) + 1/2 arcsin(-1)

> simplify(");
                                    - 1/2 Pi


Herb


-- 
---------------------------------------------------------------------------
Herb Brown  Math Dept  The Univ at Albany  Albany, NY 12222  (518) 442-4640
Director,                                          hibrown@math.albany.edu  
Computer Assisted Instruction in Mathematics       hibrown@thor.albany.edu
Newsgroups: sci.math.symbolic
From: victor@tuamotu.wri.com (Victor Adamchik)
Subject: Re: A problem with Maple integration ..
Organization: Wolfram Research, Inc.
Date: Sun, 13 Sep 1992 01:33:17 GMT


> Whereas the correct answer should be 
> 
>                Pi/2
> 
> 
> Did I do something wrong?  Or, is this a bug on the current version Maple?
> All discussion or advice are welcome.  Many thanks for your attention.
> 
> Wei-Yan

The correct answer is Pi.

--
Victor Adamchik
victor@wri.com

Newsgroups: sci.math.symbolic
From: ppc1@cec1.wustl.edu (Peter Pui Tak Chiu)
Subject: differential eqts
Organization: Washington University, St. Louis MO
Date: Wed, 16 Sep 1992 01:29:47 GMT

hi everyone,

i am new to mathematica...

i am trying to solve a differential equation using mathematica but could't
do it.  mathematica just give me back the differential equation...

In[1]:= DSolve[x + y[x] - ( x - y[x] ) y'[x] == 0, y[x], x]

Out[1]= DSolve[x + y[x] - (x - y[x]) y'[x] == 0, y[x], x]

can anyone tell me what to do???

thank you so much!!!

peter
From: masjpf@gdr.bath.ac.uk (J P Fitch)
Newsgroups: sci.math.symbolic
Subject: Re: derive - simple display question
Date: 14 Sep 92 11:01:42 GMT
Organization: School of Mathematics, University of Bath, UK

How come anyone is a new user of Derive without a Manual?  I thought
that it was only supplied with it.
==John
Newsgroups: sci.math.symbolic
From: uwostner@sfsuvax1.sfsu.edu (Ulf Wostner)
Subject: Group theory on the Mac/Quadra
Originator: uwostner@sfsuvax1.sfsu.edu
Keywords: group non-commutative algebra quadra
Organization: San Francisco State University
Date: Sun, 6 Sep 1992 18:53:27 GMT

I would like to use Mathematica to work with groups and would
greatly appreciate any pointers to existing work.

Alternatively, is there a version of GAP that runs on the Quadra?

Thanks,

Ulf Wostner

===
wostner@nes.nersc.gov
fax (510) 649-7830
===
-- 
===========================================================
Ulf Wostner                   wostner@nes.nersc.gov
Math Dept, CCSF               uwostner@sfsuvax1.sfsu.edu
Voice: 510-848-2343           AppleLink: CCSF.MATH 
Newsgroups: sci.math.symbolic
From: ara@zurich.ai.mit.edu (Allan Adler)
Newsgroups: sci.math.symbolic
Subject: limitations of Macaulay
Date: 9 Sep 92 18:26:31 GMT
Distribution: sci
Organization: M.I.T. Artificial Intelligence Lab.


I have 15 polynomials in 30 variables, half the variables being of weight 1
and have of them being of weight 186. I want to eliminate the ones of weight
1. Macaulay won't even look at the problem. It immediately gives an error
message about how the degrees are too large. I once traced Macaulay
in a debugger and noticed that it spends some of its start up time counting
how much memory there is and that from that it decides how big monomials
are allowed to be, i.e. how large a degree they can have.

Anyway, perhaps someone can tell me what resources Macaulay would have to
have in order to handle a problem of the size I described above.

Allan Adler
ara@altdorf.ai.mit.edu
Newsgroups: sci.math.symbolic
From: ara@zurich.ai.mit.edu (Allan Adler)
Subject: vector bundles with macaulay
Organization: M.I.T. Artificial Intelligence Lab.
Distribution: sci
Date: Wed, 9 Sep 1992 09:55:24 GMT



Suppose X is a projective variety, defined by a homogeneous ideal I in
a polynomial ring k[x0,x1,...,xn]. Suppose I have an explicit mapping 
f from X into a Grassmann variety, say, the variety Gr(r,m) of
r-dimensional subspaces of a vector space of dimension m. There is a
canonical r-dimensional vector bundle E on Gr(r,m) whose fibre at
a point p of Gr(r,m) is the r-dimensional space represented by p.
Let us denote the dual of E by E'. Using f, we can pull back E and E'
to X to get vector bundles over X. One can get more vector bundles
by applying other functors, such as tensor products, exterior powers, etc.
There are also other bundles that arise naturally, such as the bundle of
m-r dimensional quotient spaces, the tangent bundle of Gr(r,m), etc,
that one can also pull back or plug into functors or both.

How can I use Macaulay to compute the cohomology of X with coefficients
in these vector bundles? In particular, how can I use Macaulay to
compute the spaces of sections of these bundles? Examples will be especially
welcome.

Allan Adler
ara@altdorf.ai.mit.edu
Newsgroups: sci.math.symbolic
From: thompson@atlas.socsci.umn.edu (T. Scott Thompson)
Subject: Re: Chiwriter to Tex converter
Reply-To: thompson@atlas.socsci.umn.edu
Organization: Economics Department, University of Minnesota
Date: Tue, 8 Sep 1992 21:59:42 GMT

las@cunyvms1.gc.cuny.edu writes:

>          I  am Using the Chiwriter version 4. mathematics editor and would 
>          like to get the Chiwriter to TEX translator. I would very much
>          appreciate from anyone familiar with this converter to:

>          1) Tell me which version of tech it converts to.

The converter comes with configuration files that support Plain TeX,
AMS-TeX and LaTeX.  Presumably you could write your own configuration
files for other dialects.  I haven't tried.

>          3) Also, has anyone an e-mail address for the manufacturers of 
>          Chiwriter. The Name of the manufactures follows:

>                                 HORTSMANN SOFTWARE

That should be "Horstmann Software Design".  Phone is (408) 298-0828.
I would like an email address for them too, if you locate one.
--
T. Scott Thompson              email:  thompson@atlas.socsci.umn.edu
Department of Economics        phone:  (612) 625-0119
University of Minnesota        fax:    (612) 624-0209
Newsgroups: sci.math.symbolic
From: acar@ee.umr.edu
Subject: 3D parametric graphs?
Date: Mon, 14 Sep 1992 17:10:26 GMT
Reply-To: acar@ee.umr.edu
Organization: University of Missouri-Rolla

Is there a way to have Mathematica draw a 3D parametric graph?

I have three equations which depend on a single parameter.
I would like to get a surface graph of these equations. I checked
Graphics/Shape.m package, but it is too complicated (for me)
to understand what is going on. Moreover, I am not sure if I
can use some of the undocumented functions, like MakeShape,
used in that package.

Thank you for your interest.

******************************************************************
L. Acar				| acar@ee.umr.edu
Univ. of Missouri-Rolla		| 
******************************************************************
Newsgroups: sci.math.symbolic