HDTenEightyP/NetNews huggingface dataset:
From: dnf@suned1.nswses.navy.mil (David N Fukes)
Newsgroups: sci.math.symbolic
Subject: Re: mathematica
Date: 14 Oct 92 23:17:56 GMT
Organization: US Navy (NSWSES)

In article <21133@plains.NoDak.edu>, mooney@plains.NoDak.edu (Timothy Mooney) writes:
|> In article <1992Oct9.142218.8972@mail.cornell.edu> Ray-Zimmerman@cornell.edu (Ray Zimmerman) writes:
|> )In article <39201@sdcc12.ucsd.edu> Anand Rao, ee52fas@sdcc15.ucsd.edu
|> )writes:
|> )>i need a software package that will let me write up lab reports,
|> )>print
|> )>mathematical symbols on my laser printer, do circuit diagrams, make
|> )>tables and other things you do when writing up lab reports.  can
|> )>anybody reccomend one to me? is mathematica anygood for this sort of
|> )>thing? thanks.
|> )>
|> )>-anand
|> )
|> )No, I'm afraid Mathematica is not the type of package you're looking
|> )for.  It sounds like FrameMaker would be a good choice for you.  You
|> )can find out more by contacting "comments@frame.com" or checking out
|> )the comp.text.frame newsgroup.
|> )
|> )By the way, I use both FrameMaker and Mathematica.  I like FrameMaker
|> )for the kinds of things you mentioned.
|> )
|> ) Ray Zimmerman            \ 397 Theory Center, Electrical Engineering
|> 
|> Not to nitpick, but I believe that FrameMaker has a pretty hefty
|> pricetag (I've heard it's about $1000).  That certainly wouldn't be
|> within THIS student's budget.
|> 
|> Tim Mooney
|> 
|> -- 
|> In 'Real' Life:                      aka Tim the Enchanter, MPtQftHG 
|> Timothy Mooney                       -----------------------------------------  
|> mooney@plains.nodak.edu              +    "I'm DISAPPOINTED!" - Otto
|> NDSU Fargo ND.                       +     		A Fish Called Wanda
|> -------------------------------------------------------------------------------

FrameMaker is actully closer to $600--not exactly a bargain, however.
-- 
David N. Fukes
NSWC, PHD Code 4V12
Port Hueneme, CA 93043-5007
            Any statements/opinions made here are not the Navy's.

Newsgroups: sci.math.symbolic
From: mdclloyd@ntuix.ntu.ac.sg (David C Lloyd)
Subject: Help required to use Maple `solve'
Organization: Nanyang Technological University - Singapore
X-Newsreader: TIN [version 1.1 PL6]
Date: Fri, 9 Oct 1992 02:31:51 GMT

You can use this
a:=[solve(x^2-4,x)];
x1:=s[1];x2:=s[2];

Did you know that NTU has a local Maple discussion list? It is under Notes.

David Lloyd
From: jpg41900@uxa.cso.uiuc.edu (Justin P. Gallivan)
Newsgroups: sci.math.symbolic
Subject: Re: n,k permutations in Mma
Date: 12 Oct 92 15:39:08 GMT
Organization: University of Illinois at Urbana

ent3c@fermi.clas.Virginia.EDU (Eric  Turkheimer) writes:

>While I'm asking, is there an easy way to add a row to a matrix?  That
>is

>rowadd[{1,2},{{3,4},{5,6}}] would give {{1,2},{3,4},{5,6}}.

This is pretty easy to do, here is a function that takes a row and 
adds it to the matrix at the row requested.

gallivan_after:1> math
Mathematica 2.0 for NeXT
Copyright 1988-91 Wolfram Research, Inc.
 -- NeXT graphics initialized -- 

In[1]:= rowadd[x_List,y_List,pos_] := Insert[y,x,pos]

In[2]:= rowadd[{1,2},{{3,4},{5,6}},1]

Out[2]= {{1, 2}, {3, 4}, {5, 6}}

In[3]:= rowadd[{1,2},{{3,4},{5,6}},2]

Out[3]= {{3, 4}, {1, 2}, {5, 6}}

I hope this is what you were looking to do.  Best of luck!

>Thanks
>Eric Turkheimer
>ent3c@virginia.edu
-- 
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: hnatiw@ee.ualberta.ca (Alan Hnatiw)
Subject: MapleV - Log Plots
Summary: Is the a way of creating a log plot in MapleV
Keywords: Maple
Organization: University Of Alberta, Edmonton Canada
Date: Tue, 13 Oct 1992 04:52:24 GMT

 I have had MapleV for a month of so and I was trying to make 
 a frequency vs magnitude plot.  Since these plots are usaually
 in dB and log( freq. ) I look in my manuals to see if there was
 such and option.  I haven't found a solution yet, and I would be
 really appreciative if someone knows a way of makein log, log vs
 log plots.

 Alan Hnatiw
 internet: hnatiw@bode.ee.ualberta.ca

Newsgroups: sci.math.symbolic
From: wender@top.cis.syr.edu (Elaine Wenderholm)
Subject: Callable Interface
Organization: Syracuse University
Distribution: usa
Date: Tue, 13 Oct 92 09:55:10 EDT

1.  Does Mathematica have a callable interface?
2.  Is it possible to pipe data to Mathematica (under unix) for
    display (say, the output of a simulator) so that the data can be
    displayed as the simulation progresses?

thanks,
elaine
wender@top.cis.syr.edu
 


Newsgroups: sci.math.symbolic
From: forest@cs.unca.edu (Forest Davenport)
Subject: Factoring out terms
Followup-To: forest@photon.phys.unca.edu 
Organization: University of North Carolina at Asheville
Date: Fri, 16 Oct 1992 14:06:08 GMT

	Can someone tell me how to factor out a particular expression
from a set of terms in a previous expression?  For example, suppose I
have a set of terms like

	expn := a*b/c + a*b^2/c + a*b^3/c + a*b^4/c + ...

How can I get Maple or Mathematica to give me

	expn := (a*b/c)(1 + b + b^2 + b^3 + ...)       ?

I know this seems trivial but I can't seem to find out how to do
this from the documentation.   Thanks.

					Forest Davenport
Newsgroups: sci.math.symbolic
From: sherod@news.Colorado.EDU (Scott Herod)
Subject: Re: Differential Equations Tables
Organization: University of Colorado, Boulder
Date: Mon, 12 Oct 1992 16:30:06 GMT

 In article <1992Oct12.033454.17688@colorado.edu>, sherod@newton.Colorado.EDU (Scott Herod) writes:
 |> The work that I have been doing recently seems to lead to nonlinear
 |> ordinary differential equations which I don't recognize.  What I 
 |> would like to find is something like an integral table but for 
 |> differential equations.  Generally I would be happy seeing a 
 |> solution in terms special functions.  I usually can write down
 |> some solutions to these equations and simply would like to verify
 |> that I have all of them.  Can someone suggest a possible reference?
 |> 
 |> Scott Herod
 
Thanks to everyone that sent me suggestions.  It seems that
Zwillinger's book "Handbook of Differential Equations" is
the popular choice.

Scott
Newsgroups: sci.math.symbolic
From: ssmithap@cc.curtin.edu.au
Subject: Root Solver Program
Organization: Curtin University of Technology
Date: Mon, 12 Oct 1992 05:50:55 GMT


  Hi!

  Could anyone tell me a name of a program for an MSDOS based machine
  that can find the roots of an equation up to the nth order. (ideally
  up to 10th order or better).  Where abouts would I be able to ftp 
  such a program from.

  Could you please e-mail me your replies.

  Your help would be greatly appreciated

  Thanks

   Andrew
   ssmithap@cc.curtin.edu.au

Newsgroups: sci.math.symbolic
From: Ray Zimmerman <Ray-Zimmerman@cornell.edu>
Subject: Re: MMA 2.0 ComplexExpand bug
X-Xxmessage-Id: <A70445628901E0B5@ziklag.ee.cornell.edu>
X-Xxdate: Fri, 16 Oct 92 15: 09:38 GMT
Nntp-Posting-User: rz10@cornell.edu
Organization: Electrical Engineering, Cornell University
X-Useragent: Nuntius v1.1.1d12
Date: Fri, 16 Oct 1992 14:03:59 GMT

In article <1992Oct15.122411@masg1.epfl.ch> loris renggli,
renggli@masg1.epfl.ch writes:
>Someone did probably notice this bug of ComplexExpand :
>
>In[1]:= Simplify[ ComplexExpand[ z^2 * Conjugate[z^2] ,{z}] ]
>
>Out[1]= (I Im[z] + Re[z])
>
>So my question is : Is there a patch for this ?


I just tried this with version 2.1 on my Mac and here's what it gave:

In[1]:=
Simplify[ ComplexExpand[ w^2 * Conjugate[w^2] ,{w}] ]

Out[1]:=
      2        2 2
(Im[w]  + Re[w] )

This appears to me to be correct.  If in fact version 2.0 yields the
answer you say, the only "patch" I know of is to upgrade :-).

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 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: admg@eng.cam.ac.uk (A.D.M. Garvin)
Newsgroups: sci.math.symbolic
Subject: MATLAB with TRIDENT SVGA card
Date: 12 Oct 92 21:47:01 GMT
Organization: Cambridge University Engineering Department, England

We've got MATLAB 3.5e installed on a new machine here, but there seems
to be some corruption of the display if one reverts to a previously
drawn graph (VGA mode)

eg: PLOT(RAND(10)) {plots OK}
    SHG            {strange corruption in intensity plane}

The video card is based on the Trident8900 chipset (1Mb RAM),
and seems OK with other programmes.

The manual mentions something about IBM BIOS problems - but 
are there any fixes for the Trident card in particular ?

Any help would be much appreciated,

Thanks,
David Garvin
(admg@eng.cam.ac.uk)
From: oded@fiber-bits.ai.mit.edu (Oded Maron)
Newsgroups: sci.math.symbolic
Subject: making ListPlot3D work in MMA
Date: 15 Oct 92 16:36:50 GMT

Well, thanx to all the people who replied to my question about 
plotting a list of 3D points in mma.  The most complete answer
came from the support people at Wolfram, so I'm posting it along with
my question.  It should be noted that it took them 10 days to answer
my query, so not the best turnaround time...

----------------------

Hi,

I would like to give ListPlot3D a list of 3-d points, and for it to
return a surface which fits those points.  However, ListPlot3D only
takes lists of heights (or z values) and assigns its own x and y
values.

My question is: why can't ListPlot3D act like ListPlot and just extend
it by one dimension?  If there is an easy way to do that, please tell
me.  If not, it would be a great thing to put into the next version of
Mathematica.

Thanx,

Oded

=================================================================
This is a common question.  It is also somewhat complex compared 
with ListPlot due to the extension from working in 2-Dimensions
to working in 3-Dimensions.

ListPlot3D is the the list plotting version of Plot3D rather than
the 3D version of ListPlot.   As with Plot3D it is optimised for 
rendering the surface defined by a  rectangularly spaced grid of 
heights.

To use ListPlot3D on a data set with x and y values which are 
non-integers you should use the MeshRange option.

ListPlot3D[ data, MeshRange -> {{xmin, xmax}, {ymin, ymax}}]

The data here is {{z11, z12, ....}, ...} and it will be plotted
on a rectangular grid over the xy plane.

If your data is properly ordered (defined below) but not rectangular
you can use the function ListSurfacePlot3D in the package 

Graphics`Graphics3D` and which is documented in the "Guide to  
Standard Mathematica Packages".

This can be thought of as a list plotting equivalent of  
ParametricPlot3D.

It will take

ListSurfacePlot3D[ {{ p11, p12, p13, ...}, { p21, p22, p23, ...},  
.}]

where the pij are {x, y, z} triples, form the polygons

Polygon[ {pij, p(i+1)j, p(i+1)(j+1), pi(j+1)}]

and display the result.   Note that the points do not have to 
be rectangularly spaced but they must be ordered.

If this is not suitable the alternatives include:

1) 	Use the function TriangularSurfacePlot in the package 
	DiscreteMath`ComputationalGeometry` which is also documented 
	in the "Guide to Standard Mathematica Packages".  There are
	examples of it's use there.

2)	Using an interpolation function 

	intfun = Interpolation[ data] ;
	data = Table[ intfun[ x, y],{y,y0,y1},{x,x0,x1}] ;
	ListPlot3D[ data, MeshRange -> {{x0, x1], {y0,y1}}]

	will plot your surface.

The usefullness of these different surface plotting techniques all 
depend on how your data is organized.  In deciding which function
to use you should decide what sort of data you have and then chose
appropriately.
  

Tom Wickham-Jones

---------------------------

Oded
From: twillis@top.cis.syr.edu (Thomas Willis)
Newsgroups: sci.math.symbolic
Subject: Re: Mathematica question on 3d list plots
Date: 7 Oct 92 22:29:04 GMT
Organization: Syracuse University CIS Dept.

In article <28793@life.ai.mit.edu>, oded@fiber-bits.ai.mit.edu (Oded Maron) writes:
|> 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
|> 

If you want to do a 3D ScatterPlot, use this

 Show[Graphics3D[ Map[Point,array] ]]

There is a function, somewhere in Graphics that does exactly this.  It's
useful if you want to put lines between the points.

				--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: Ray Zimmerman <Ray-Zimmerman@cornell.edu>
Subject: Re: mathematica
X-Xxmessage-Id: <A6FF39CBFC01E0B5@ziklag.ee.cornell.edu>
X-Xxdate: Mon, 12 Oct 92 19: 18:51 GMT
Nntp-Posting-User: rz10@cornell.edu
Organization: Electrical Engineering, Cornell University
X-Useragent: Nuntius v1.1.1d12
Date: Mon, 12 Oct 1992 18:13:25 GMT

In article <21133@plains.NoDak.edu> Timothy Mooney,
mooney@plains.NoDak.edu writes:
>)No, I'm afraid Mathematica is not the type of package you're looking
>)for.  It sounds like FrameMaker would be a good choice for you.  You
>)can find out more by contacting "comments@frame.com" or checking out
>)the comp.text.frame newsgroup.
>)
>)By the way, I use both FrameMaker and Mathematica.  I like FrameMaker
>)for the kinds of things you mentioned.
>)
>) Ray Zimmerman            \ 397 Theory Center, Electrical Engineering
>
>Not to nitpick, but I believe that FrameMaker has a pretty hefty
>pricetag (I've heard it's about $1000).  That certainly wouldn't be
>within THIS student's budget.
>
>Tim Mooney

First of all, I believe that the commercial prices for FrameMaker (at
least for Mac, which is what I use) are much lower than $1000, closer
to about $500-$600, or maybe less by now ... granted, still out of
student price range (I know, I'm one too).  The educational prices
for FrameMaker however are closer to $200.  Still expensive, but I'm
assuming that if he's looking at Mathematica, he can afford to look
at FrameMaker.

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 Ray Zimmerman            \ 397 Theory Center, Electrical Engineering
                           \ Cornell University, Ithaca NY  14853
 Ray-Zimmerman@cornell.edu  \ Phone: 607-254-8819  Fax: 607-255-9072
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Newsgroups: sci.math.symbolic
From: jpg@spectre.unm.edu (Jeffrey P. Golden)
Subject: Re: Solving transcendental equations in MMA
Date: Wed, 14 Oct 92 20:14:13 GMT
Organization: Dept. of Math & Stat, University of New Mexico, Albuquerque

Reply-To: jpg@macsyma.com

> Date: 14 Oct 92 14:30:48 GMT
> From: Hal.Varian@umich.edu
> Subject: Re: Solving transcendental equations in MMA
> Message-Id: <1992Oct14.143048.23471@lsa.umich.edu>
> References: <1bh3hmINNcdi@function.mps.ohio-state.edu>vax
> Organization: University of Michigan Math Dept
>
> In article <1bh3hmINNcdi@function.mps.ohio-state.edu>  
> edgar@function.mps.ohio-state.edu (Gerald Edgar) writes:
> > In article <1992Oct14.055350.24912@leland.Stanford.EDU>  
> cchan@leland.Stanford.EDU (Chung Chan) writes:
> > > Does anyone know how I can possibly solve for:
> > > 1 + x = 2^x in MMA?
> > 
> > In Maple:  > eq := 1 + x = 2^x;
> >                                                x
> >                                 eq := 1 + x = 2
> > > solve(eq,x);
> >                               W(- 1/2 ln(2)) + ln(2)
> >                             - ----------------------
> >                                        ln(2)
> > where:  W - the function satisfying  W(x) * exp(W(x)) = x
> 
> Looks to me like x=1 is also a solution.

Looks to me like x=0 and x=1 are the only real finite solutions.

From: Jeffrey P. Golden <jpg@macsyma.com>
Organization: Macsyma Inc.
Reply-To: jpg@macsyma.com
From: rsherme@nswc-wo.nswc.navy.mil (Russel Shermer)
Newsgroups: sci.math.symbolic
Subject: Re: Mma: ImplicitPlot3D (or lackthereof).
Date: 13 Oct 92 13:57:41 GMT
Article-I.D.: relay.1992Oct13.135741.28295
Organization: Naval Surface Warfare Center - White Oak


Here is a summary of email responses for those who requested it.

There is a p.d. package by Steven Wilkinson called ImplicitPlot3D
that does exactly what I requested.  It is available along with 
other mathematica codes on a server called mathsource.wri.com which
can be reached via anonymous ftp or using a mail server daemon.  For
info via the mail server, send a message with the line:

help intro

a lengthy reply will be sent with detailed information. 


Thanks to all who replied!

	---Russ
From: gaylord@UX1.CSO.UIUC.EDU
Newsgroups: sci.math.symbolic
Subject: Re: >=0
Date: 15 Oct 92 14:17:26 GMT


 Tone Dieckmann, TONE%makro@sunslc1.rz.uni-mannheim.de
Date: 14 Oct 92 23:16:00 GMT
In article <9210142059.AA08472@yoda.physics.unc.edu> Tone Dieckmann,
TONE%makro@sunslc1.rz.uni-mannheim.de writes:
writes:
>I have a trivial but pressing problem with the Sign function. Is
>there any built-in function that returns the sign of any term like
>y^2 (supposed to be >= 0)? I have tried to write a function which
>returns True if the term is >=0 and False otherwise, but it doesn't
>work as I expected. The function is
>
>geq0[x_] := If[x >= 0, True, False]
>
>geq0[x_^2] := True
>
>This is what it does:
>
>In[1]:= geq0[y^2]
>Out[1] = True
>
>In[2]:= geq0[2 y^2]
>Out[2]= False            
========================================

this is not a trivial question but it really requires you to understand how
pattern matching works in mathematca.

first; you have entered two rewrite rules for geq0.

your second rewrite rule geoq0[x_2] := True  returns true for any labelled
pattern that is raised to the 2nd power. 

thus it gives true for y^2  (note your first rewrite rule is not being used
here)

now, when you put in 2 y^2 it is internally represented in Mathematica as 

FullForm[2 y^2]
Times[2, Power[y, 2]]

now looking at both of your two rewrite rules, 

 you are really asking

(a) using the first rewrite rule: is Times[2, Power[y, 2]] an expression
which is greater than or equal to zero. mathemaitca of course has no way of
knowing this because you haven't told mathematica what y is (remember this
is a symbolic manipulation program). since it can't say that its true it
returns false.

(b) your second rewrite rule isn't used here because  Times[2, Power[y, 2]]
is not an expression raised to the second power (ie., it doesn't have the
representation Power[y, 2]).

bottom line: you thought if mathematica 'knows' that y^2 is positive, then
it must realize that 2 y^2 is also positive. however, you never taught
mathematica that y^2 was positive. you simply 'taught' it to return a
result True when it 'sees' a pattern y^2.  and then when you put in 2 y^2
you put in a different pattern to match. .

anyway, this is the way, i see the problem. 

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

"if you're not programming functionally, then you must be programming
dysfunctionally"
From: schlumpf@forty2.physik.unizh.ch (Felix Schlumpf)
Newsgroups: sci.math.symbolic
Subject: Re: Advice sought: Purchasing Mathematica
Date: 7 Oct 92 17:17:39 GMT
Organization: Physics Institute University Zuerich, Switzerland

In article <19fgr5INNh96@agate.berkeley.edu>, fateman@peoplesparc.Berkeley.EDU (Richard Fateman) writes:
> In article <YeiZhuS00VoGEDLW4H@andrew.cmu.edu> es2j+@andrew.cmu.edu (Edward John Sabol) writes:
> >2. How much slower is Mathematica without FPU support? For most of the
> >symbolic stuff, it shouldn't be slower at all. Graphing, numerical
> >integration, root solving, curve fitting of data should suffer, but I'm
> >curious as to how much.
> 
> I've asked this question on this news group before, and in spite of the
> passage of many weeks, I've seen no evidence that the student version
> is slower.

I have tested this issue some times ago with Mma 2.0 on my Mac IIsi
with MacOs 7.0.1. For floating point operations there is a factor of
about 2 (for graphic it is less, and for matrix operations it is much
more, about factor 7). For integer operations (symbolic stuff) the 
enhanced version was 30 %  faster than the student version. 
This numbers are some average values I remember by heart. For a specific
calculation you may get another result. 

Hope this helps  Felix.
-- 
Felix Schlumpf, Institut fuer Theoretische Physik, Universitaet Zuerich
Internet: schlumpf@physik.unizh.ch
From: cyor@undergrad.math.waterloo.edu ( )
Subject: Is there any Modelling and Simulation Software for Mma?
Organization: University of Waterloo
Date: Sun, 11 Oct 1992 00:52:33 GMT

Is there any Simulation and Modelling Software that works with 
Mathematica?  I want those with good GUI.

Thanks..

P.S.  I heard that for MatLab, there is such a software called Simulink
      that does Simulation and Modelling.  Any positive/negative feedback?

Newsgroups: sci.math.symbolic
From: Ray Zimmerman <Ray-Zimmerman@cornell.edu>
Subject: Re: mathematica
X-Xxmessage-Id: <A6FB0F2B7D02E0B5@ziklag.ee.cornell.edu>
X-Xxdate: Fri, 9 Oct 92 15: 27:55 GMT
Nntp-Posting-User: rz10@cornell.edu
Organization: Electrical Engineering, Cornell University
X-Useragent: Nuntius v1.1.1d12
Date: Fri, 9 Oct 1992 14:22:18 GMT

In article <39201@sdcc12.ucsd.edu> Anand Rao, ee52fas@sdcc15.ucsd.edu
writes:
>i need a software package that will let me write up lab reports,
>print
>mathematical symbols on my laser printer, do circuit diagrams, make
>tables and other things you do when writing up lab reports.  can
>anybody reccomend one to me? is mathematica anygood for this sort of
>thing? thanks.
>
>-anand

No, I'm afraid Mathematica is not the type of package you're looking
for.  It sounds like FrameMaker would be a good choice for you.  You
can find out more by contacting "comments@frame.com" or checking out
the comp.text.frame newsgroup.

By the way, I use both FrameMaker and Mathematica.  I like FrameMaker
for the kinds of things you mentioned.

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 Ray Zimmerman            \ 397 Theory Center, Electrical Engineering
                           \ Cornell University, Ithaca NY  14853
 Ray-Zimmerman@cornell.edu  \ Phone: 607-254-8819  Fax: 607-255-9072
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
From: cordes@ac.dal.ca (John Cordes)
Newsgroups: sci.math.symbolic
Subject: Re: Help required to use Maple `solve'
Date: 8 Oct 92 10:15:17 -0300
Organization: Dalhousie University, Halifax, Nova Scotia, Canada

In article <1992Oct8.131132.1@ntuvax.ntu.ac.sg>, ma1346631@ntuvax.ntu.ac.sg writes:
> I have some problem using the Maple command `solve'. 
> 
> For example, if I write
>>solve({x^2-4},{x});
> 
> it will give me the following
> 	{x:=2,x:=-2}
> 
> My problem is: how do I put these 2 values into separate variable 
> names ie. x1:=2 and x2:=-2; so that I can use these 2 values separately
> and for different purposes?

 Try something like this:

 sol:=solve({x^2-4},{x});
 x1:=sol[1];
 x2:=sol[2];

I think you will find that then x1 contains 2, etc.  (sol is a sequence.) 


John Cordes, Dept. of Physics,
Dalhousie University, Halifax, N.S.,
Canada  B3H 3J5       Internet: cordes@ac.dal.ca
Newsgroups: sci.math.symbolic