## How to perform this kind of integrals?...

Hello!

I am trying to integrate this function numerically from x=0... 1, by using int and evalf(Int) but maple cannot handle it. Is there another kind of numerical integration?

(2*x-1)^2*(2*n+(5*(2*x-1))*(x-1))*(2*n-5+5*x)*ln(1-(5*(1-x))*x/n)/((1-x)^2*(-2*n-(15*(1-x))*x))

Are there another kind of procedures to do numerical integration?

## how can maple be used for Heyting Algebra...

Bellissima used kripky modules to find the labels for one and two generators. the number of these labels increses to a very large number as we add another level. Can maple help count these lables? and how?

## How to solve this PDE equation...

Dear maple users

Greetings.

I hope you are all fine.

In this code, I am solving the PDEs via pdsolve with numeric.

There is some mistake in the boundary condition and pdsolve.

Kindly help me that to get the solution for this PDE.

In this problem h(z) is piecewise

Bc:

code:JVB.mw

Note: z=0.5:

## How can i draw 3d graphic of fractional operator...

Hi everyone, i want to draw 3d graphics of fractional solution with given by Mittag Leffler function in cantor sets. I want to see like this graphic. I added maple file. Thanks in advance.

## solve thin plate equations but encountered errors...

Hi, dear community,
I have a Maple package "rath" for finding the traveling wave solution of differential equations. But I am not able to loading in Maple 18. Please see this attached zip folder and need help in this regard.
Kind regard

PaperExp.mws

rath.txt

## plotting with respec to time t?...

How to plot u(t)= z'(t) with respect to x, y, z?

Here,  z(t)=y'(t), y(t)=x'(t).

where, x(t)= z^3(t), y(t)= z^3(t)/2, z(t) = (a- b), a, b are time interval.

## How to plot trajectories with range ?...

Trajectories.mw

How to solve the matrix for u(t) and plot phase trajector?

## Differential equation numerically ...

How to solve this differential equation numerically

## something wrong with a function in a procedure...

Hello!

I have a difficulty with a function used in procedure. The procedure uses a multivariable function and if the specific choice of the function is not made the procedure seems to give proper result, but In case I make a specific choice of the function and then try use this procedure gives me incorrect result.

To be more exact I use Physics package (there is a need to calcute combinations of covariant derivates ). The calculations are performed in a curved space with a defined metric.

So here is the procedure:

SD2 := proc (psi) SumOverRepeatedIndices(g_[~kappa, ~lambda]*(d_[kappa](d_[lambda](psi(X)))-Christoffel[~sigma, kappa, lambda]*d_[sigma](psi(X))))^2-SumOverRepeatedIndices(g_[~kappa, ~rho]*(d_[kappa](d_[lambda](psi(X)))-Christoffel[~sigma, kappa, lambda]*d_[sigma](psi(X)))*g_[~lambda, ~tau]*(d_[rho](d_[tau](psi(X)))-Christoffel[~gamma, rho, tau]*d_[gamma](psi(X)))) end proc;

If I turn to the procedure :

SD2(psi);

the result is  correct.

But  then I specify a psi function:

psi:=(t,r,x,y,z)->chi(r)+q*t;(here q is supposed to be a constant)

and turn to the procedure once again:

SD2(psi);

It gives me a wrong result.

I don't know what is the reason.

Thank you.

## How to solve Boundary value problem in set of eq...

System of equations with boundary conditions are moving?

Also, find the values of unknown variables?