Mariusz Iwaniuk

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8 years, 192 days

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These are replies submitted by Mariusz Iwaniuk

Maple 17: release date is: March 13, 2013.

Maple 2017: release date is: May 25, 2017

During these 4 years int command it has been improved and is more powerfull.

@mwahab 

With Maple 2020.2 works fine.Maybe is version issue.

See attached file.

solution_bug_1_ver2.mw

@Nick_99

Maple can compute only 5.1268948 > t >0 because singularity.

I update the answer.

From Help pages:

The discont option is not available in the 3-D case.  In this situation, it is recommended that you divide the plotting ranges into subranges to avoid the discontinuities, generate the individual plots and then combine them using the plots[display] command.  The view option can be used to control the ranges in the final display.
 

@Carl Love

An example: 

DSolve is symbolic solver.

NDSolve is numeric solver.

What value have c parameter? Or is c(t,x) ?

For k(x)  function using FourierTransform it just: k(x)= (1/4)*sech((Pi*x)/2) .

@graleo 

If I change to:  u2(x, 1) = 1 ,Maple give me a error messages: "unable to handle elliptic PDEs", that's mean Maple can't solve.

See for more info: https://www.mapleprimes.com/questions/227556-Elliptical-PDEs

@graleo 

Please post the equations, in copy-and-pastable Maple format. It is unrealistic to expect people to re-key them.

It is impolite to expect other people to have to type in your equations for you.

@Axel Vogt 

Looks like:

sum(2^(2*j)*(-2*j + 1)^(-j)*GAMMA(-1/2 + j)/sqrt(Pi) - 2^(2*j)*(-2*j + 1)^(-j)*GAMMA(-1/2 + j)*GAMMA(j + 1, (-1/2 + j)*ln(2))/(sqrt(Pi)*GAMMA(j + 1)), j = 0 .. infinity);

evalf(%);

0.690239719

With no hope for closed-form.

Please post the equations, in copy-and-pastable Maple format. It is unrealistic to expect people to re-key them.

It makes it convenient for them and more likely you will get someone to help you.

Please post the equations, in copy-and-pastable Maple format. It is unrealistic to expect people to re-key them.

@vv 

 

@panke 

I don't have maple  version 13.

Above code works on maple 2020.

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