Maple 18 Questions and Posts

These are Posts and Questions associated with the product, Maple 18

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.

3D_graphic.mw3D_graphic.mw

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

inform.txt,

PaperExp.mws

rath.txt

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.

Trajectories.mw

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

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

How to solve this differential equation numerically

eq:=diff(f(tau), tau) =Af(tau) +Lf(tau) +C+Bf(tau)


 

restart

R := .46+9.1625*t^alpha/(GAMMA*(alpha+1))+8.8318*t^(2*alpha)/(GAMMA*(2*alpha+1))+11.6888*t^(3*alpha)/(GAMMA*(3*alpha+1));

.46+9.1625*t^alpha/(GAMMA*(alpha+1))+8.8318*t^(2*alpha)/(GAMMA*(2*alpha+1))+11.6888*t^(3*alpha)/(GAMMA*(3*alpha+1))

 

.32+0.9282e-1*t^alpha/(GAMMA*(alpha+1))+2.1126*t^(2*alpha)/(GAMMA*(2*alpha+1))+3.9028*t^(3*alpha)/(GAMMA*(3*alpha+1))

 

.52+0.569e-1*t^alpha/(GAMMA*(alpha+1))+0.243e-1*t^(2*alpha)/(GAMMA*(2*alpha+1))+1.3102*t^(3*alpha)/(GAMMA*(3*alpha+1))

 

.46+9.1625*t^alpha/(GAMMA*(alpha+1))+8.8137*t^(2*alpha)/(GAMMA*(2*alpha+1))+8.8450*t^(3*alpha)/(GAMMA*(3*alpha+1))

 

.32+0.9282e-1*t^alpha/(GAMMA*(alpha+1))+2.1126*t^(2*alpha)/(GAMMA*(2*alpha+1))+1.9472*t^(3*alpha)/(GAMMA*(3*alpha+1))

 

.46+0.569e-1*t^alpha/(GAMMA*(alpha+1))+0.243e-1*t^(2*alpha)/(GAMMA*(2*alpha+1))+.6551*t^(3*alpha)/(GAMMA*(3*alpha+1))

(1)

``


 

 

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)

additionally(0 < alpha)

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?

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.

 

 

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

 

 

 

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

waiting for your reply.

Please see the figure for the model plot.

Can this equation has four integer solutions? 
I am consider the equation a^2*x^2/(x-a)^2+x^2 = m/n and trying to find the integer numbers a, m, n so that the given equation has integer solutions?

Four_integer_solutions.mw

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