1521 Reputation

8 years, 347 days

diverges...

`The integral diverges !!!`

help("piecewise"); and "...

`help("piecewise");`

and "Enter" ?

I doubt......

I doubt  be  can solvelable in Maple even near future,unless the people from Maple they will get to hard work.

Even Mathematica can't solve.

I don't think so.....

`In my opinion it should be: int(y'(x)*x^2/(x^2-1),x) = int(sqrt(y(x)),x)^(-2/3)`

Syntax wrong!...

int[y'(x)* (x^2)/[(x^2)-1],x)  =  (int[sqrt(y(x)])^(-2/3)

Maple give me errors ?

@Prakash J  Use: dsn := dsolve([...

Use:

```dsn := dsolve([eq1, eq2, eq3, eq4, ics], numeric, delaymax = tau, method = ck45);
dsn := dsolve([eq1, eq2, eq3, eq4, ics], numeric, delaymax = tau, method = rkf45);```

From Help:

"rkf45 finds a numerical solution using a Fehlberg fourth-fifth order Runge-Kutta method with degree four interpolant. This is the default method of the type=numeric solution for initial value problems when the stiff argument is not used.  The other non-stiff method is a Runge-Kutta method with the Cash-Karp coefficients, ck45.
"

Try...

```restart;
InverseElzakiTransform := proc(F, v) inttrans:-invlaplace(eval(F/v, v = 1/v), v, t); end proc;
F := v^(n + 2);
(InverseElzakiTransform(F, v) assuming (0 < n));

#t^n/GAMMA(1 + n)```

If inverse laplace transform can't solve we have to use another way or another mathematical mainpulation.

```InverseElzakiTransformBYInverseFourier := proc(F, v) (limit(exp(-Z*t)*inttrans:-invfourier(eval(eval(F/v, v = 1/v), v = Z + w*I), w, t), Z = 0, right) assuming (0 < t)); end proc;
F := v^3/(v^2 + 1);
InverseElzakiTransformBYInverseFourier(F, v);

#sin(t)

InverseElzakiTransformBYInverseMellin := proc(F, v) (simplify(eval(inttrans:-invmellin(eval(F/v, v = 1/v), v, t, 1 .. infinity), t = exp(-t))) assuming (0 < t)); end proc;
F := v^3/(v^2 + 1);
(InverseElzakiTransformBYInverseMellin(F, v) assuming (0 < n));

#sin(t)```

I can only write in Maple Integral Transform are very Very weak.

Maple code !...

Please share the code in copyable form, so that other users can play with it. No one wants to retype all this code (and double check for correct transition). This will raise your chances for getting quick and competent help.

With Maple 2022.2 and 2023 works fine....

```R0 := 1/(a - sqrt(b + c*cos(x)));
R1 := (int(R0, x = 0 .. 2*Pi) assuming (0 < a, 0 < b, 0 < c)):
a := 0.9;
b := 4.5;
c := 0.1;
R1;

#-5.145818656 - 0.*I```

Principal arguments and moduli of the 5 ...

See........................... here.

@QM  Ok. You want Maple to compare...

Ok. You want Maple to compare with Mathematica,for indefine integrals you may see on this web site.

Regards M.I.

Why are you asking if you know how to c...

`Why are you asking if you know how to calculate it ?`

@somestudent  Try: INV := invztr...

Try:

```INV := invztrans((z - 1)^2/(a*z^2 + b*z + c), z, n);
INVnew := simplify(allvalues(INV));
simplify(evalf(subs(a = 2, b = 1, c = 4, eval(subs(n = 16, INVnew)))), zero);```

Regards M.I.

@Axel Vogt That's where in my c...

That's where in my codes I should use the fnormal to make Maple solved my PDE ?

I just wanted to compare the results between Mathematica and Maple and nothing else.

I got the  PDE equation from this weblink.  and maybe it will clear everything up.

Thanks.

I separate real and imaginary parts in PDEs, but plot3d is doesn't it look the same?

What have I done wrong?

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