HDTenEightyP/NetNews huggingface dataset:
From: jpg41900@uxa.cso.uiuc.edu (Justin Gallivan)
Newsgroups: sci.math.symbolic
Subject: Re: themaxima program from the Mathematica conference.
Date: 28 Sep 92 19:22:13 GMT
Organization: University of Illinois at Urbana

gaylord@UX1.CSO.UIUC.EDU writes:

>the functional program for maxima (which should have won the programming
>contest at the Mathematica conferene) is :

>write a program that returns a list of those elements in a list that are
>larger than all of the elements to their left

>maxima[{4,2,-3,7,9,-1,13,6,28,17,35}]
>{4, 7, 9, 13, 28, 35}

>maxima[x_] := Union[Rest[FoldList[Max,-Infinity,x]]]

>can someone tell what the pattern matching version (which did win the
>contest) of this function is
>(i need it to show alternative [even if terribly inefficient] programming
>styles in Mathematica:

>thanks.

>richard j. gaylord, university of illinois, gaylord@ux1.cso.uiuc.edu

Here is the solution that we submitted that won for elegance...

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

In[3]:=  Clear[Maxima]

In[4]:= Maxima[x_]:=x//.{a___,b_,e___,c_,d___} :> {a,b,e,d} /; c<=b

In[5]:= Maxima[{4,2,-3,7,9,-1,13,6,28,17,35}]

Out[5]= {4, 7, 9, 13, 28, 35}

Solution by Calculus&Mathematica Development Team 
Horacio Porta, Bill Davis, Paul McCreary, Alan DeGuzman, Justin Gallivan, and
David Wiltz (with the assistance of Tom Wickham-Jones).




-- 
Justin Gallivan                Calculus&Mathematica Development Team
gallivan@after.math.uiuc.edu   University of Illinois at Urbana-Champaign
-------------------------------------------------------------------------
"That's CAUCASIAN trash to you, pal" -C.M. Dockstader 8 May, 1992
Newsgroups: sci.math.symbolic
From: ganter@milton.u.washington.edu (M. Ganter)
Subject: Re: GROBNER BASIS
Organization: University of Washington
Date: Wed, 30 Sep 1992 21:27:40 GMT

oscar@meibm4.cen.uiuc.edu (Oscar Ruiz) writes:

>I am trying to use Grobner basis to solve problems of consistency and 
>existence of solutions of polynomial sets. I have tried Maple, Mathematica
>and Macaulay already. THe problem is that even for the most simple systems
>the amount of time any one of them take is incredible (if finish at all).
>My question is this: Is there any SERIOUS , REAL application of Grobner
>basis in software for Geometric Modeling?? If so, could I get in touch with
>the people responsible of them so I can contact them for advice??

>Does anybody know a non-trivial class of problem for which Grobner basis
>is computationally feasible, and, is there a software which does it??

Please consider some background reading on Grobner basis.  Good things just
take time.  My colleage and I have been using Grobner basis and Resultants
weekly for about 1-2 years.  The ISSAC conference usually provides new
techniques/algorithms which deal with Grobner.  Currently, Reduce has
the sugar cube algorithm of T. Mora's and H. Hong at ISSAC 92 presented some-
ting that looks promising (code to be available later this year).  I agree
with you that Grobner is pricey (my last job ran 3 days and had a virtual
size of 6 GB) but useful if it finishes.  For some interesting applications
look in G. Salmon's books on algebraic geometry.  Good luck ...Mark

Mark Ganter/Univ of Washington/Seattle, WA 98195/ganter@u.washington.edu
From: kbs@ccr-p6.ccr.jussieu.fr (An OCR-IP fan)
Newsgroups: sci.math.symbolic
Subject: 3j, 6j...symbolic coefficients
Date: 30 Sep 92 22:04:33 GMT
Organization: Universites P. & M. Curie / D. Diderot

Hi world,

I'm looking for a system that will be able to compute
the (symbolic) coefficients: 3j, 6j, 9j.....

Thanx for any answers, posts or mails,


-- 
=============================================================================
Laboratoire d'Electrochimie - Universite Paris 7  |Khac Binh Su
4, place Jussieu, Tour 44/45, 75005 PARIS. FRANCE |e-mail: kbs@ccr.jussieu.fr
=============================================================================
From: lvkelly@venus.lerc.nasa.gov (Kelly Carney)
Newsgroups: sci.math.symbolic
Subject: Hardcopy from Mathematica (DOS)
Date: 1 Oct 92 14:24:00 GMT
Organization: NASA Lewis Research Center
News-Software: VAX/VMS VNEWS 1.41

HELP!

I just got Mathematica for my 386 system.  It seems
to be working just fine.  My problem is getting the
hardcopy out.  When I execute the PRINTPS command
I get a 

abnormal program termination : memory protection fault

I get this message whether I boot up with a "loaded"
CONFIG.SYS or a "clean" CONFIG.SYS.

I have 8MB extended memory which the MINSTALL doesn't 
seem to find, at the printer definition step. I have
tried to manually input several different memory numbers,
and none of them seem to work. 

To run Mathematica I had to get rid of the emm386 device,
but I was able to leave in the himem.sys device and the 
dos=high command.  This was is the "loaded" CONFIG.SYS.
The "clean" CONFIG.SYS didn't have any of this.


Can anyone offer any advice?

Kelly Carney
lvkelly@venus.lerc.nasa.gov
Newsgroups: sci.math.symbolic
From: jpg@spectre.unm.edu (Jeffrey P. Golden)
Subject: Re: Integral Tables
Date: Tue, 29 Sep 92 18:04:14 GMT
Organization: Dept. of Math & Stat, University of New Mexico, Albuquerque

Reply-To: jpg@macsyma.com

> Date: 29 Sep 92 11:49:14 GMT
> From: dak@messua.informatik.rwth-aachen.de (David Kastrup)
> Subject: Re: Integral Tables
> Message-Id: <dak.717767354@messua>
> References: <10843.Sep2607.19.3092@virtualnews.nyu.edu>, <1992Sep28.145114.17232@mail.cornell.edu>.co
> Organization: Rechnerbetrieb Informatik  /  RWTH Aachen
> 
> Ray Zimmerman <Ray-Zimmerman@cornell.edu> writes:
> 
> >In article <10843.Sep2607.19.3092@virtualnews.nyu.edu> D. J. Bernstein,
> >brnstnd@nyu.edu writes:
> >>1-x positive or negative?'' whenever I gave it such an integral? Sure,
> >>Mathematica thinks that sqrt((-1)^2) = -1, but just because the new
> >>technology produces wrong answers doesn't mean that the old technology
> >>did.
> 
> >Mathematica 2.0 on the Mac thinks that Sqrt[(-1)^2] = 1.  Please check
> >before posting this type of information.
> 
> So both are wrong. hooray. sqrt((-1)^2) = +- 1, that is either value,
> depending on the choice of the Riemann leaf. 

Most CAS define their `SQRT' function to mean principal branch. 
There's nothing wrong with that.  Check how many can return -2 as 
a possible answer when given sqrt(4) .

> And if you choose the leaf you would expect from the squaring, 
> you get -1. 

(-1)^2 = (1)^2 .  So writing it as sqrt((-1)^2) is just an artefact 
and it is still just  sqrt(1) .  This has nothing to do with what 
sqrt(1)  means.  Similarly, sqrt((x-1)^2) and sqrt((1-x)^2) should 
always mean the same thing.  

> If you want to choose the `main' leaf, you get 1.  Fixing it one 
> way or the other can always lead to problems.

You give no evidence for this statement.  Defining `sqrt' in a CAS 
to consistently mean principal branch works in many areas.  Often 
when there are bugs it's because this consistency is bypassed.

From: Jeffrey P. Golden <jpg@macsyma.com>
Organization: Macsyma Inc.
Reply-To: jpg@macsyma.com
From: jaffer@zurich.ai.mit.edu (Aubrey Jaffer)
Newsgroups: sci.math.symbolic
Subject: Re: Computer Algebra book?  Maple?
Date: 2 Oct 92 03:09:40 GMT
Article-I.D.: camelot.JAFFER.92Oct1220940
Organization: M.I.T. Artificial Intelligence Lab.

In article <Bv336K.8L6@news.cso.uiuc.edu> gaylord@ux1.cso.uiuc.edu (Richard J. Gaylord) writes:

   i just called kluwer (617-871-6600) and  the book "Algorithms for
   Computer Algebra" is available now for $140. 
   the book weighs 2 lbs (thus it is fortunate that they are taking all that
   heavy money out of your pocket).

   if 8 or more books are ordered at one time, the cost drops to $75 per
   copy. anyone interested in organizing a  group  order ?

That is quite a lot of money.  Has anyone seen this book?  What does
it have in it?  Can someone post the table of contents?
From: wvenable@algona.stats.adelaide.edu.au (Bill Venables)
Newsgroups: sci.math.symbolic
Subject: Re: symbolic algebra and teaching math/sciences
Date: 5 Oct 92 02:14:52 GMT
	<1992Oct3.180652.7505@sarah.albany.edu>
Organization: Department of Statistics, University of Adelaide
NNTP-Posting-Host: algona.stats.adelaide.edu.au
In-reply-to: hibrown@sarah.albany.edu's message of 3 Oct 92 18:06:52 GMT

>>>>> "Herb" == Herb Brown <hibrown@sarah.albany.edu> writes:

Herb> We have been using MAPLE V in our Computer Classroom to teach various
Herb> levels of mathematics with some success for the last 2 1/2 years. ...

Here also.  However do you use the "Student package" only, (which requires
more effort and imagination from the student), or do you simply use full
strength Maple V?  [Here it's a bit complicated, but mostly full strength.]


--
___________________________________________________________________________
Bill Venables, Dept. of Statistics, | Email: venables@stats.adelaide.edu.au
Univ. of Adelaide, South Australia. | Tel: +61 8 228 5412  Fax: ...232 5670
Newsgroups: sci.math.symbolic
From: katherle@daisy.uwaterloo.ca (Kate Atherley)
Subject: Re: Maple on 386sx or 386
Organization: University of Waterloo
Date: Fri, 2 Oct 1992 00:23:46 GMT

In article <1992Sep30.203252.11747@samba.oit.unc.edu> Jim.Buddenhagen@bbs.oit.unc.edu (Jim Buddenhagen) writes:
>I have and IBM PC clone which is a 386sx with 4 meg of memory, running DOS 5.0,
>25 mhz.  Is there a version of Maple which will run in this environment?
>If so, how well would it run?  Does anyone have personal experience with this? 
>

Maple V for DOS will run perfectly well on your PC.  Maple needs a 386, 3MB of RAM, 
and 8MB of space on your hard disk.  A math-coprocessor is not required, although
Maple will use one if it is present.  

For more information about Maple, please contact info@maplesoft.on.ca .

Kate 
Waterloo Maple Software Technical Support
Newsgroups: sci.math.symbolic
From: jpg41900@uxa.cso.uiuc.edu (Justin Gallivan)
Subject: Re: themaxima program from the Mathematica conference.
Organization: University of Illinois at Urbana
Date: Mon, 28 Sep 1992 19:50:26 GMT

>Here is the solution that we submitted that won for elegance...

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

>In[3]:=  Clear[Maxima]

>In[4]:= Maxima[x_]:=x//.{a___,b_,e___,c_,d___} :> {a,b,e,d} /; c<=b

>In[5]:= Maxima[{4,2,-3,7,9,-1,13,6,28,17,35}]

>Out[5]= {4, 7, 9, 13, 28, 35}

>Solution by Calculus&Mathematica Development Team 
>Horacio Porta, Bill Davis, Paul McCreary, Alan DeGuzman, Justin Gallivan, and
>David Wiltz (with the assistance of Tom Wickham-Jones).

(Just a note, this is the solution as I recall it from May, I can't remember
where we saved the original but this should be pretty close to it)

-- 
Justin Gallivan                Calculus&Mathematica Development Team
gallivan@after.math.uiuc.edu   University of Illinois at Urbana-Champaign
-------------------------------------------------------------------------
"That's CAUCASIAN trash to you, pal" -C.M. Dockstader 8 May, 1992
From: mhiroshi@tansei.cc.u-tokyo.ac.jp (H. Murakami)
Newsgroups: sci.math.symbolic
Subject: My trouble with GAP (GROUP calculator).
Date: 1 Oct 92 19:04:19 GMT
Organization: Hokkaido Univ. However I am subject to tansei for JUNET.

I ftped gap3r2p1 for the Unix source code
and compiled it using /bin/cc or gcc2.2.2.

The document writes that the system is interactive,
I thought I will calculates the example in the document
of determining the rubic cube's group.

However, I found the system I created won't show what I
typed in after the system prompt "gap>" and only the result is
returned.

Has anyone there overcome this difficulty or there is any
nice way to change the mode of the system?
I like the system show the user what user's input line is
typed in as each stroke of the key. (since I am a poor typist.)

-------------------------------------------------------------------------------
                         $BJbJbJbJbJbJbJbJbJb(J              $BB<>e(J	$B90(J
PPPPPPPP                   $B3Q(J          $BHt(J
RNBQKBNR                 $B9a7K6d6b6L6b6d7K9a(J   mhiroshi@tansei.cc.u-tokyo.ac.jp
From: yi@fife.ecn.purdue.edu (Juneho Yi)
Newsgroups: sci.math.symbolic
Subject: Volume formular of a tetrahedron
Date: 28 Sep 92 04:31:45 GMT
Distribution: usa
Organization: Purdue University Engineering Computer Network

Hi, netters, 
I have a simple question for you.

I got a formula for computing the volume of a tetrahedron from a Math
table book. Let P1 = (x1, y1, z1), P2 = ...   and P4 =(x4, y4, z4) be 
the four vertices of a tetrahedron.

Then the volume V is,

 V = 1/6 Determinant [(x1, y1, z1, 1), ..., (x4, y4, z4, 1)].
                       first row               fourth row

I know that a tetrahedron is 3-D simplex though I am not a
mathematician.
Could someone tell me where I can find an easy proof of this volume
formular ? What is the negative value mean that the formular can give
? 
I will appreciate direct response to my e-mail address.
Thank you.

-- yi@ecn.purdue.edu
From: unregistered@newcastle.ac.uk (Tony McDonald)
Newsgroups: sci.math.symbolic
Subject: MMa,SE/30's and remote kernels?
Date: 28 Sep 92 14:25:22 GMT
Followup-To: sci.math.symbolic
Organization: Newcastle Uni. Computing Services

Hi,
Can anyone help?
Our user is running Mma 1.2.2f33 enhanced on two SE/30's running system
7.0.1/tuneup 1.1.1 and MacTCP 1.0.1.

He can start up a remote kernel on one machine (to a sun) no problem, but
when trying to do the same on the other SE/30 gets the following message:-

The MacTCP network is in a confused or inconsistent state. You must reboot
your Macintosh before attempting any further network activity.

MMa then will refuse to allow any further attempts to start a remote
kernel.

Is this error message from Mma or MacTCP?

I believe that the working SE/30 has the same configuration of software as
the duff one - so what gives?

Any pointers would be appreciated - if it turns out to be a problem that
many people are having - I'll summarise

Tone.
-----------------------------------------------------------------
Tony McDonald (Tone)                       Tony.McDonald@ncl.ac.uk
Computing Officer - Apple Mac Support      namm2@ncl.uk.ac
Newcastle University, NE1 7RU, UK
Newsgroups: sci.math.symbolic
From: palmerp@math.orst.edu (Paul A Palmer)
Subject: Re: "Mathematics", HELP!
Reply-To: Paul Palmer <palmerp@math.orst.edu>
Organization: Dept. of Math, Oregon State University
Distribution: eunet
Date: Sun, 27 Sep 1992 01:20:58 GMT

In article <AABJSmgO7A@clib.kiev.ua> yabvg@clib.kiev.ua (Valentina G.Yablonovskaya) writes:

   Does anybody know something about software package "Mathematics"?
   Where and how I can obtain (get, buy) it?

[email to yabvg@clib.kiev.ua bounced with "host unknown"]

If you're looking for "Mathematica", here's where to ask:

Here are the various routes to contact Wolfram Research, Inc.:

US Mail:       100 Trade Center Drive
               Champaign IL 61820-7237

Phone:         217/398-0700

Fax:           217/398-0747

Orders:        800/441-MATH

E-mail:        info@wri.com             (to request various information)
               suggestions@wri.com      (to provide suggestions)

--
Paul Palmer
Department of Mathematics     	E-mail: palmerp@math.orst.edu
Kidder Hall 368
Oregon State University, Corvallis, Oregon 97331-4605
Newsgroups: sci.math.symbolic
From: jpg@spectre.unm.edu (Jeffrey P. Golden)
Subject: Mathematica: Help Simplifying an Infinite Sum
Date: Mon, 28 Sep 92 23:06:08 GMT
Organization: Dept. of Math & Stat, University of New Mexico, Albuquerque


Reply-To: jpg@macsyma.com

> Date: Mon, 28 Sep 92 04:04:51 GMT
> From: stanly@crunch.unm.edu (Stanly Steinberg)
> Subject: Mathematica: Help Simplifying an Infinite Sum
> Message-Id: <r!_p+9f@lynx.unm.edu>
> Organization: University of New Mexico, Albuquerque NM
> 
> In the following, ans is obviously zero:
> 
> f[x_,y_] := Sum[a[n]*Sin[n*Pi*x]*Sinh[n*Pi*y],{n,1,Infinity}]
> 
> ans = D[f[x,y],{x,2}] + D[f[x,y],{y,2}]
> 
> How can I force mathematica to see this??
> How about f[1,y] = 0??

By the way, in Macsyma, this stuff happens automatically:

(c1) f(x,y):=sum(a[n]*sin(n*%pi*x)*sinh(n*%pi*y),n,1,inf);

(d1)  f(x, y) := sum(a  sin(n %pi x) sinh(n %pi y), n, 1, inf)
                      n

(c2) ans:diff(f(x,y),x,2)+diff(f(x,y),y,2);

(d2)                             0

(c3) f(1,y);

(d3)                             0

From: Jeffrey P. Golden <jpg@macsyma.com>
Organization: Macsyma Inc.
Reply-To: jpg@macsyma.com
From: sg04@ploni.gte.com (Yechezkal Shimon Gutfreund)
Newsgroups: sci.math.symbolic
Subject: A List of Mathematica Functions
Date: 27 Sep 92 02:38:11 GMT
Reply-To: sgutfreund@gte.com
Organization: GTE Laboratories, Waltham MA


It is fairly easy to make a List of Formal Functions in
Mathematica, e.g.

 {f1[#]&, f2[#], f3[#]}

However I need to make a list of functions similiar to:

 {f1[a_, b_] := body1, f2[a_, b_] := body2}

Obviously this does not work.

what I currently do is make strings of the form:

f1[a_,b_] := body1

Use ToExpression to make them expressions, then make
a list of the form:

  {f1[#]& , f2[#]& ... }

I use need to make this list, then MapIndex[] it over a list
of values. 

Ideas?

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Yechezkal Shimon Gutfreund		 		  sgutfreund@gte.com
GTE Laboratories, Waltham MA			    harvard!bunny!sgutfreund
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Newsgroups: sci.math.symbolic
From: chungy2@aix.rpi.edu (Yau Felix Chung)
Subject: Books for sale
Followup-To: chungy2@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY
Date: Sat, 3 Oct 1992 19:21:59 GMT

				BOOK SALE!!



Through The Telescope by Michael R. Porcellino (hard cover)........$14.00              
Local Area Networks: The Next Generation by Thomas W. Madron.......$20.00           
The Boundary Value Problems in Mathematical Physics by 
	O. A. Ladyzhenskaya (hard cover)...........................$52.00           
Subatomic Physics by H. Frauenfelder & E. M. Henley (hard cover)...$57.00           
Applications of Group Theory in Physics and Mathematical Physics
	by M. Flato, P. Sally & Gregg Zuckerman (hard cover).......$70.00             
A First General Relativity by Bernard F. Schutz (hard cover).......$20.00                 

	* All prices are negociable
	* Shipping charges are not included it the prices above.

		If interested please e-mail chungy2@aix.rpi.edu

Newsgroups: sci.math.symbolic
From: hw@madvlsi.columbia.edu (Hongmo Wang)
Subject:  Why Mma fails on this simple manipulation?
Organization: Columbia University
Date: Mon, 28 Sep 1992 15:28:03 GMT
X-Posted-From: france.madvlsi.columbia.edu
NNTP-Posting-Host: sol.ctr.columbia.edu

What is wrong here?

To-math: "Simplify[Reduce[(-2*e + e^2 - 2*e^3 - 2*l + e*l +
    2*e*(1 + 4*e^2 + (2*l)/e + l^2/e^2)^(1/2) -
    e^2*(1 + 4*e^2 + (2*l)/e + l^2/e^2)^(1/2))/(e^2-e*l) == 0, l]]" aEVAL

From math: -2 + e != 0 && e != 0 && l == (e*(-2 + 3*e))/(-2 + e)

To-math: "Simplify[(-2*e + e^2 - 2*e^3 - 2*l + e*l +
    2*e*(1 + 4*e^2 + (2*l)/e + l^2/e^2)^(1/2) -
    e^2*(1 + 4*e^2 + (2*l)/e + l^2/e^2)^(1/2))/(e^2-e*l) /. l -> e*(-2+3*e)/(-2+
e)]" aEVAL
From math: -8 - 8/e^2 + 12/e + 2*e

It should give " 0 "!!

Can anybody help to explain? I am really worried.

-hw
Newsgroups: sci.math.symbolic
From: twillis@top.cis.syr.edu (Thomas Willis)
Subject: Re: Need package to display lattices (and labels) in mma
Organization: Syracuse University CIS Dept.
Date: Thu, 1 Oct 92 12:51:02 EDT

In article <2AC80D57.18563@news.service.uci.edu>, jstern@aris.ss.uci.edu (Jeff Stern) writes:
|> 
|> Does anyone know of one?  I am aware of Steven Skiena's package,
|> Combinatorica, but I need one to display the labels, as well.
|> 
|> Thanks in advance, Jeff Stern.  jstern@aris.ss.uci.edu

-- 
Skeina has the ShowLabeledGraph functions, which allows the nodes to be
labeled.  See pg. 103 of his book.  
			
								--tj

-----------------------------------------------------------------------------
o-----o     T.J. Willis
|\    |\                                                   Pressure(t)
| o---+-o   twillis@nova.npac.syr.edu              lim    -------------
o-+---o |   Research Assistant                     t->oo    Grace(t)
 \|    \|   Syracuse Center for Computational Science
  o-----o   Northeast Parallel Architectures Center          << Disclaimer.m
-----------------------------------------------------------------------------

Newsgroups: sci.math.symbolic
From: bronstei@inf.ethz.ch (Manuel Bronstein)
Subject: Re: Computer Algebra book?  Maple?
Organization: Dept. Informatik, Swiss Federal Institute of Technology (ETH), Zurich, CH
Date: Fri, 2 Oct 1992 12:07:31 GMT

In article <JAFFER.92Oct1220940@camelot.ai.mit.edu> jaffer@zurich.ai.mit.edu (Aubrey Jaffer) writes:
>That is quite a lot of money.  Has anyone seen this book?  What does
>it have in it?  Can someone post the table of contents?

Chapter 1: Introduction to Computer Algebra
Chapter 2: Algebra of Polynomials, Rational Functions and Power Series
Chapter 3: Normal Forms and Algebraic Representations
Chapter 4: Arithmetic of Polynomials, Rational Functions and Power Series
Chapter 5: Homomorphisms and Chinese Remainder Algorithms
Chapter 6: Newton's Iteration and the Hensel Construction
Chapter 7: Polynomial GCD Computation
Chapter 8: Polynomial Factorization
Chapter 9: Solving Systems of Equations
Chapter 10: Groebner Bases for Polynomial Ideals
Chapter 11: Integration of Rational Functions
Chapter 12: The Risch Integration Algorithm
...around 600 pages in all.

Is it worth the $140? My personal opinion is that if you're just taking
computer algebra as an aside, it's overpriced. But if you intend to do
some work on CA algorithms, get this book first!

-----------------------------------------------------------------------------
    ____________
   /      /    /   /                Manuel Bronstein
  /---   /    /___/                 bronstein@inf.ethz.ch
 /      /    /   /                  Informatik, ETH Zuerich, Switzerland
 ----  /    /   /                   Tel: [41] (1) 254-7474
                                    Fax: [41] (1) 262-3973
-----------------------------------------------------------------------------
Newsgroups: sci.math.symbolic
From: qmdbms@gsusgi2.gsu.edu (Brian Schott)
Subject: Re: symbolic algebra and teaching math/sciences
Organization: Georgia State University
Date: Mon, 5 Oct 1992 10:33:51 GMT

If you really want to make it hard for students, show them the HP48 hand
calculator.  To me it is too difficult to use.  

Theorist is quite dandy for simpler algebra, IMHO. Prescience (Theorist
developer) is rumored to be developing Theorist for Unix, too.


-- 
Brian Schott/Decision Sciences Dept.             qmdbms@gsusgi2.gsu.edu
College of Business Administration                         404-651-4070
Georgia State University                  interests: approx. reasoning,
Atlanta, Georgia USA 30303-3083     (B=)       decision support systems
From: oded@fiber-bits.ai.mit.edu (Oded Maron)
Newsgroups: sci.math.symbolic
Subject: Mathematica question on 3d list plots
Date: 2 Oct 92 20:50:20 GMT

I can't seem to get Mathematica to plot lists of 3-d points correctly
using the command ListPlot3D.

What happens when I do Listplot3D[{{x1,y1,z1},{x2,y2,z2},...}}]
(obviously inserting real values for the variables), is that I get
a graph of {{x1,1,z1},{x2,2,z2},...}}.  In other words, it ignores
one of the coordinates and places the point numbers instead of it.

Help, anyone?

Oded