## 1481 Reputation

8 years, 192 days

## Maple 17: release date is: March 13, 201...

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 fin...

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.

## Only info....

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.

## Any comment?...

@Carl Love

An example:

DSolve is symbolic solver.

NDSolve is numeric solver.

## ?...

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

## HINT...

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

## Maple can't solve....

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.

## @graleo  Please post the equations...

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...

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.

## No Maple code ,No help!...

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.

## @panke  I don't have maple&nbs...

I don't have maple  version 13.

Above code works on maple 2020.

 3 4 5 6 7 8 9 Last Page 5 of 30
﻿