Auto_regne_dokument.mw

My maple froze while it was running. I saved and closed it and now it gives me this message when i try to open it "There was a problem in the loading process, you worksheet may be incomplete.". 

There is only one backup file and it is corrupted as well. I tried to see if i could work it out in the text file, but im not very good at doing this.

If anyone knows how to uncorrupt it pls help me 

Dear all
I have a boundary value problem, 
How can I solve the problem using maple or maybe we can introduce serie expansion to solve it or something else.

BVP_frac.mw

Thank you for your help 

I have problem to calculate the max value for 3d  phase potret for each period. Thank You

 deplot3d-animated_SIA.mw

How could one reduce this equation int(x^2*diff(y(x), x)/(x^2 - 1), x) = int(y(x)^(1/2), x)^(-2/3)down to a first order ordinary differential equation? Maple can solve this equation, namely, 9*(1/x^(5/3) - 1/x^(11/3))*x*(sqrt(y(x))*x)^(8/3)/(8*(x^2 - 1)) - 3*x*(4*x^2 - 1)*(1/x^(5/3) - 1/x^(11/3))/(8*(x - 1)*(x + 1)) + _C1 = 0 , however I could not understand how this equation was arrived at, leading me to go to 'odeadvisor', which responded with y = G(x,y'(x)) labelled as the 'patterns' method, which appears to require a first order ode - that is why I raised the reduction question.

Please pardon the poor format below.  I'm new to Maple and cannot figure out how to cut and paste worksheet code which includes  Maple prompts.  

I would like to create a list of funtions in a set and then select one and plot its real or imaginary surface.  I'm able to do this with a single function below:

h := z -> z^(1/2);
    h := proc (z) options operator, arrow; z^(1/2) end proc

plot3d(Im(h(x + y*I)), x = -1 .. 1, y = -1 .. 1);

This plots the Imaginary surface of z^(1/2).  However I need to do this with a set of functions delimited with curly brackets such as:

functionList = {2 + z, z^2 - 3*z, -z^3 + 4};
                          /        2          3    \ 
          functionList = { 2 + z, z  - 3 z, -z  + 4 }
                   \                        / 

And if I now try and select the first function in functionList and attempt to plot it, the plot is blank.

v := z -> functionList[1];
v := proc (z) options operator, arrow; functionList[1] end proc

plot3d(Im(v(x + y*I)), x = -1 .. 1, y = -1 .. 1);
Warning, expecting only range variables [x, y] in expression Im(functionList[1]) to be plotted but found name functionList[1]

 Can someone help me with this problem and also explain to me how to format this post nice like the others?

Thanks for reading.

I wanted to solve a pde of two variables in spherical coordinates with a boundary condition at a specific radius. I am doing something wrong because the pdsolve just evaluates for several minutes and does not actually give anything.

Could someone have a look and let me know what I am doing wrong.

Download laplacian.mw

Hi,

How to generate different letters? I've tried the 'exclude' option, which doesn't work in this context. Thank you.QuestionAlphabet.mw

I have data that I've binned in list. I'd like to plot in as a histogram. 

dataplot sort of does it but doesn't give the x-axis that I used but just the bins.

Yes, I know about Histogram from Statistics. To plot 1000000 values I have to enter them all into a list which seems crazy when all I want is a 100 bin histogram. Doing the binning is trivial, but I can't figure out how to plot it with a sensible x-axis (show range used to define the 'histogram')

Hi,

I want to provide my students with a series of exercises involving radicals, but I don't want the final simplification to display rational exponents. I only want a solution in simplified form with radicals. Ideas? Thanks

QRadicaux.mw

how to make a phaseportrait curves with animation? so i can see how the curve going on. Thank you

caring_phase_pemanenan_predator_dgn_parametersesuai_jurnal.mw

Hello,

I am experiencing difficulties using my old Maple programs with the newer version. I tried changing the types of inputs and the typesetting level, but it just doesn't work. I would appreciate it if someone could help me overcome my ignorance.

Some simple input is attached with the output.

Hi everyone, I am trying to draw bar graph for my expression, but received error. Could anyone please help me in this regard.

Help_Bar_graph.mw

Hi

On the latest Maple 2022 version, using dsolve with 1st order ODE and Dirac function returns an incorrect solution

dsolve({D(y)(t) + y(t)/tau = Dirac(t)/tau, y(0) = 0})

See attached image. The correct impulse response should be :

y(t) = exp(-t/tau)*Heaviside(t)/tau

The returned solution is 0 for t = 0 and scaled by a 1/2 for t > 0. I never had such an issue with older Maple versions. Is this a bug or am I doing something wrong

Here is the expected solution followed by the Maple solution:

Hi,

I use the RamdonGraph function quite a bit and wanted to know if it is possible to generate random graphs with specific properties, beyond the typical order, size, connectednes, etc. Specifically, I am interesting in generating eulerian (containing an eulerian circuit), semi-eulerian (containing an eulerian trail) and hamiltonian (containing a spanning cycle)  graphs. Also, the abiltiy to randomly generate graphs that have none of these properties would be helpful.

How do I find the contents of a bin in a Maple histogram?