## 1401 Reputation

7 years, 163 days

## 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.

## Share ?...

@manju

What do you mean by share ?

## Forumla is not correct.

See attached file:

Area.mw

## Are you saying that after 4 years o...

Are you saying that after 4 years on MaplePrimes, you don't know how to even enter the above equations into Maple?

## @student_md Try:eq := diff(u(x, t),...

Try:

```eq := diff(u(x, t), t \$ alpha) - diff(u(x, t), x \$ 2) - sqrt(u(x, t)^2) + u(x, t)^2 = 0;
IC := [u(x, 0) = 3];
Asolve([eq], IC, index = 16, alpha = 1, x = 0 .. 2, t = 0 .. 1, u = 0 .. 10, output = plot, pade = [20, 20]);```

for: u(x,t) > 0.

lyzinfo@gmail.com

ypliu@cs.ecnu.edu.cn

lizb@csecnuedu.cn

## First all we need all Maple code ,a cert...

First all we need all Maple code ,a certain minimum amount of effort is expected from the poster of a question.

Unfortunately it will be hard to help you without actual code we can use to reproduce the issue

## @Rouben Rostamian     It'...

It's time to go about it so you don't get far behind the competition like another software aka: Mathematica,COSMOL,Matlab

## Weakness for many years......

And when we see  a numeric elliptic solver in Maple.?

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