MaplePrimes - Newest Questions and Posts

MapleSim Tutorial Error!

bornag — Thu, 23 May 2013 00:33:35 Z

Some errors in MapleSim Tutorials! While I was working with MapleSim tutorials, I have encountered some problems that the results did not match the answer. I have uploaded the files, that I have worked on, in a zip file to this address (http://www.mediafire.com/download/2pirvfbawyjfa18/MapleSim_Projects.zip). The problems are as follows:

1. Based on video tutorial on this page (

Help with 2D Numerical Integration

jschulzb — Wed, 22 May 2013 23:52:32 Z

Hi,

I'm trying to estimate a very diffcult integral with Maple. Here it is

restart;
chi:=Pi/2-theta:
epsilon:=0.001:

Vsi:=-(1/sqrt( 1+epsilon - cos(chi)*cos(phi-Pi/3)) + 1/sqrt( 1 +epsilon- cos(chi)*cos(phi-Pi))+ 1/sqrt(1+epsilon-cos(chi)*cos(phi+Pi/3)));

evalf((Int(Vsi*SphericalY(3,2,theta,phi)*conjugate(SphericalY(2,1,theta,phi))*sin(theta), [theta=0..Pi,phi=0..2*Pi])));

I ultimatly want epsilon->0,...

How to view the code that controls embedded components?

Carl Love — Wed, 22 May 2013 23:06:58 Z

How does one view the Maple code that controls embedded components in a worksheet? I've looked at every menu on the toolbar and every context menu I could find, but nothing seems to fit.

Error Message in Maple Code

charlesforgy — Wed, 22 May 2013 17:22:51 Z

I got the following error message when trying to execute a maple code:

"invalid character in short integer encoding 69 E"

I can't find anything about it in the maple documentation, does anyone have any idea what it means?

Thanks.

Eigenvalues Of Critical Points

trace — Wed, 22 May 2013 16:20:02 Z

Hello guys ,

I found critical points for a 3-D dynamical system (x,y,z) and m which in general is not constant (m(z/y) is a function of z.y, when i calculate eigenvalue for every critical point ,the maple assume m constant . how i find eigenvalues for general m which is not constant and is a function of z/y .

Thank You

ww.mw

Maximum of a function of three variables

maplelearner — Wed, 22 May 2013 15:51:40 Z

Dear Maple experts,

I have a function f depending on three variables a,b,c i.e. f(a,b,c).

I have to find the df/da (differentiation with respect to a) and then solve for variable a in terms of variables b and c to make the f(a,b,c) into f(b,c).

However, I am not able to find the symbolic relation from df/da to represent variable a interms of variables b and c because the solve(df/da, a) is...

how do i make a program for shielding a nuclear reactor

nale — Wed, 22 May 2013 08:08:28 Z

A beam of neutrons bombards a reactor's wall. Consider the motion of the neutrons as a random walk on the (x,y) plane.

The neutrons then have to comply with the following conditions:

Only four directions of motion are possible (left, right, up or down).

Can't define function dependendy

rabhay1987 — Wed, 22 May 2013 08:01:06 Z

in following coding
final equations Exp1 ,Exp2, Exp3, Exp4 depends on X2 and X3, but in these equations I have introduced certain equations which are also depending on X2 and X3,like fccL[Ni, Si] etc, but that dependend variable is counted as different variable while plotting the function or evaluating it Help me please

> restart;> NULL;> ;>
R := 8.314;>
G1[1] := piecewise(298 <= T and T < 1358, -7770.458+130.485235*T-24.112392*T*ln(T...

stop a maple worksheet in between by writing a command

verdin — Wed, 22 May 2013 07:02:56 Z

Hello all.

I want to execute a particular section of my legthy code, after certain lines I want that let Maple not execute further. It could be a possibility that after those ceratin line I may execute my code further. I dont want to comment those lines as some later stage I may use them again. Is there any command which can fulfill my purpose.

Many thanks in advance.

discrete fourier transform should gives real number of a vector, but not,why

zippon — Wed, 22 May 2013 02:30:51 Z

construct a vector with entries of symmetric real parts and anti-symatric imaginary parts,such as v:=<1+2I,5+3I,9+4I,9-4I,5-3I,1-2I>;DiscreteTransforms[FourierTransform](v);By property of fourier transform,the result should be real numbers,but it is not this. Imaginary parts not vanish

What could possibly be the problem?

casperyc — Wed, 22 May 2013 00:21:28 Z

Hi all,

I am running xmaple via linux, version 17.

This is on a Unbuntu OS X64 with i7 940X, and 4G RAM.

Casper

fsolve in module - F1

wzelik — Tue, 21 May 2013 20:34:11 Z

Hi,

Could someone check, what it is wrong?.

I have tried to use fsolve inside module in startup code.

I will be appreciated.

wzel

test.mw

why i get 4 equal roots when solving a biquadratic equation?

bello nakone — Tue, 21 May 2013 19:36:01 Z

relativistic_63.mw relativistic_63.mw relativistic_63.mw relativistic_63.mw relativistic_63.mw

Maple 16 - Function as parameter in a procedure

billykhoja — Tue, 21 May 2013 18:42:16 Z

Hi, how can I make a prodecure in Maple 16 that takes a function as a paremter and then manipulates with it?

e.g

Test := proc(f)
return f(10):
end proc

And I can then run Test(f(x)) and get f(10) back?

Thanks

2,000,000 digits!

Marvin Ray Burns — Tue, 21 May 2013 16:06:33 Z

On May 17, 2013 I finished a 2,000,000 or more digit computation of the MRB constant, using only around 10GB of RAM. It took 37 days 5 hours 6 minutes 47.1870579 seconds. You can write marvin@marvinrayburns.com for the digits.
The program I used was based on Richard E. Crandall's work:
Richard E. Crandall, Unified algorithms for polylogarithm, L-series, and zeta variants (53 pages)