Solving Helmholtz' equation by seperation of variables yields a solution of the form

(a*exp(I*k_x*x)+b*exp(-I*k_x*x))*(c*exp(I*k_y*y)+d*exp(-I*k_y*y))

if we consider a wave in the first quadrant that is moving away from the x axis then it has the form

c*(a*exp(I*k_x*x)+b*exp(-I*k_x*x))

is it possible to plot this wave in the first quadrant?

Also if I switch to polar coordinates (r,theta) can I produce similar plots of rays?

I recently purchased a new MacBook Pro (retina) with Mountain Lion and found that my Maple 12 programs would not run.  So I updated to Maple 16.  Initially all seemed to work well.  But now when i try to open a Maple .mw file, I get the message

"File acm23test.mw could not be found.  Please select a different file."

What has happened and how can I get my programs working again?

DavidR

Hello,

so I have the following function to be plotted:

M = (1+y^2)/((x^2+1)*(1+z^2))

Anyone have any background knowledge on the above 3D polynomial?  Assuming all 4 parameters are real I ploteed some 3D plots & some interesting surfaces are generated.  I imagine this has some physical application.  If anyone has some knowledge on this please respond & include any references you might know of.

Thanks

Aslam-u-Alikum. How are you? I want to construct an operators to find the derivative and integration of fractional order please help me i am so tens.Jam.mw

Hello all,

I created an active high pass filter and tried to obtain bode plot from "Linear System Analysis."

I could do that but now I want a transfer function of the active hight pass filter.

So as in title, I want to know how to get transfer function of the system from "Linear System Analysis."

Any helps would be appriciated.

Yukihiro

Hi everybody,

I already discussed my tasks with @Preben Alsholm. Therefore, I decided to share it with you and try to finalize solution.

Actually, I want to calculate heat dynamics transfer between one, two or more rooms. Hence, I used heat balance approach to set the system of differential equations:

In the following code, why is B returned unevaluated?

restart:
A:= a:  B:= 2:
F:= _a-> eval(`if`(A,B,C), a= _a):
F(true);
                               B
eval(B);
                   ...

The "ExcelTools" seems can work based on Excel 2003 format,which can only support 2^16 rows.Excel 2010 format cantains much more rows and columns. So I want to know when maple can support Excel 2010?

Yesterday I’ve updated to the new Version 17.01 and now I’ve the problem that I cannot enter  ‚}‘ and another problem is an exponent e. g. x^2. To enter it I have to write x^22. The first number is not shown in the worksheet.

I hope someone can help me to solve this problem.

Are you in or near Berkeley, California?

Are you experienced with Maplesoft for academics?

Can you train a student to use it with the tutorials and your own knowledge?

This student is located at University of California, Berkeley and needs an immediate hands on private trainer.

He will be taking Calculus 1A next semester and needs to learn to use this program this summer.

He is a student who uses an eye control computer without the use of his hands and needs this

Hi, 

     I'm computing some difficult integrals, involving Spherical Harmonics. I've proved that the answer must be a real number, and yet Maple returns a complex number. Also Mathematica returns purely real numbers, so I wonder if there is a bug in Maple. I found if I break the integrand into real and imaginary parts, and add them I get the right answer...usually.  Anyway's here's the code and the proof, I suspect they could be a bug...

@acer My question is about highly oscillatory integral.I wanna integrate 
int(int(f(x,y)*exp(i*w*g(x,y),y=0..1),x=0..1)) which is higly oscillatory integral in a triangle with vertices  (0,0),(1,0),(1,1) and with g(x,y)=x^2+y^2. Since g(x,y) has stationary  point at (0,0), I have to interpolate f(x,y) except (0,0) but also quite close to (0,0). The problem is that since...

hello, i'm using maple, in order to draw a graphic in wich, different functions are plotted, 
these functions came from one with 4 variables, wich represents losses in a phenomenon (extraction) depending on diffenrent variables, so my objective is to varry only one parameter and then draw its curve, and this for each parameter ; i had 4 functions.

with(plots):

f1:=plot((n-1)/(-1+n*10^(6.77*((n-1)/n))), n=1.0537..1.2688):

f2:=plot(0.2365/(-1+1.2365*10^(0.0155*O)), O=76.42..99.92):...