Maple can't solve PDE with numerics.

@JonMcLoone 

When will we see the version 12.1 ?

Mathematica have only up to 2*10^14.

@mahmood1800 

For first question:

You have 6  conditions:

1. f3(0,t)=-exp(-2*t)

2. f4(x,0)=exp(-3*x)*cos(2*Pi*x)

3. f1(x,3)=0

4. f1(3,t)=0

5. f2(x,3)=0

6. f2(3,t)=0

and we have a  5 constants,one condition is too much.

For second question:

No,is not true and not allowed.

Regards M.I

@aabdulla 

I don't know the answer to your question. I'm just a regular user, not a MAPLE developer.

@aabdulla 

With corrected syntax I able to solve integral with Maple.

See attached file.

Integrals_Sheet2-BB.mw

@Kitonum

eval(FR, [a = 0, b = 2, k = 2, l = 2]) # is Zero not TRUE ?

int(eval(sqrt(1 + k^2*Pi^2*cos(Pi*x/l)^2/l^2), [l = 2, k = 2]), x = 0 .. 2, numeric)#4.609785323 OK.

You Can optimize gif so that the file would take up smaller capacity.

@Axel Vogt 

Yes you have right.Definition in Maple is:

F(w) = int(f(t)*exp(-I*w*t), t = -infinity .. infinity)

but in Mathematica is:

F(w) = *1/sqrt(2 Pi))*int(f(t)*exp(I*w*t), t = -infinity .. infinity)

@NaeemQau 

Add a numeric value for alpha ? and Then You have "too many boundary conditions: expected 22, got 23"?

Exit and Alt+F4 works as intended in Windows 10 Home build 1809 on Maple 2019.2.  

Do you have any reason to believe that a closed form symbolic(analytic) solution should exist? Questions like this should always indicate why it is reasonable to expect a solution. 

@johncarl 

int(1/(c*x + d)^2, x = a .. b) assuming a < b, 0 < a, 0 < c, 0 < d;

#-(-b + a)/((a*c + d)*(b*c + d))

int(y^2*exp(-I*omega*y), y = -infinity .. infinity);

#undefined

@Mohamed19 

Add a new Question   to MaplePrimes.It makes it convenient for them and more likely you will get someone to help you. 

Regards M.I.