## 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.

## How to simplify the product of 4x4 matrices?...

How to simplify the product of 4x4 matrices and how can we take out the expression that appears in each entry of the matrix?

MLM-1.mw

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?

## How to write an expression with indices?...

I have the following expresion:

G_{ik}=|u_{i} - u_{k}|-(u_{i}-u_{k})^2

Where i, k=1,2,3,4. How can I write this expresion in maple? I want to be able to write G_{1 2} and in the RHS 

## Differential equation numerically ...

How to solve this differential equation numerically

 >
 >
 (1)
 >

## How can i use fracdiff commute for fractional PDEs...

Hi everybody, I want to find

the second-order derivative according to alpha. Since the computer could not calculate in this way, I took the derivative twice in a row.

assume(alpha <= 1)

then output is

again using the fracdiff

then output is

but I want to see

after the last command. Should alpha be defined specifically for this?

## 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.

## Pythagorean Triples Ternary Tree

Maple 18

I make a maple worksheet for generating Pythagorean Triples Ternary Tree :

Around 10,000 records in the matrix currently !

You can set your desire size or export the Matrix as text ...

But yet ! I wish to understand from you better techniques If you have some suggestion ?

the mapleprimes Don't load my worksheet for preview so i put a screenshot !

Pythagoras_ternary.mw

Pythagoras_ternary_data.mw

Pythagoras_ternary_maple.mw

## How to plot the excel data...

Dear maple users,

Greeting for the day.

I have some data in an excel file. How to plot the excel data in contours with labels.

Also, how to show the x-axis range =-1.5..1.5 and y-axis range = -0.5..1 with the contour sequence -2..2.

XLdat.xlsx

Please see the figure for the model plot.