2 years, 55 days

## How is u defined in Maple?...

How is u defined in Maple?

## @mmcdaraI REALLY APPRECIATE IT. Yes...

@mmcdara

I REALLY APPRECIATE IT.

Yes, unfortunately, I have many faults.
What is add? Why didn't you put sum?

I want a code that solves a differential equation. in such a way that it shows the relationship of 10 in the same way despite the presence of psi. And in the next series, the psi function should be defined and then it should be in such a way that the values of r and s are given for example 1, -2, i... be) and then put in the main equation to simplify the equation and get the unknown values.

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## Thanks...

How do I do this? Can you modify my instructions?

## @C_R  Difficulty in drawing a 3D d...

Difficulty in drawing a 3D diagram
Hello, I want to draw a 3D diagram that has i inside, but it gives me an error. Can anyone help me?

```clc
clear
close all
% plot grid
t = linspace(-5, 5, 100);
n = linspace(-5, 5, 100);
% compute plot grid values
[T, N] = meshgrid(t, n);

% compute Z values
Z = -2.*sin(2)*(cos(T).*sin(T).*i - cos(T).^2 + 1./2).*cos(2)./((4.*cos(2).^2 - 2).*sin(T).*cos(T));

% plot
surf(T, N, Z);
title(' Diagram3D With Surfc','fontsi',20,'interpreter','latex')
xlabel('X','fontsi',20,'interpreter','latex')
ylabel('Y','fontsi',20,'interpreter','latex')
zlabel('Z','fontsi',20,'interpreter','latex')
colorbar;
colormap hsv```

## @acer  Thank you for taking the ti...

Thank you for taking the time to do this

I saw them but I couldn't solve the problem. It is true that my questions seem similar but they are different. I am working on the same method with different equations and different paths.

## Why do for loops make errors?...

Why do for loops make errors?

ssssssssss.mw

OK

Much obliged.

## @acerI very much appreciate your help.&n...

@acer

I very much appreciate your help.

How can it be trigonometric?

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## @Oliver K  I appreciate your takin...

I appreciate your taking the time.

## @Thomas Richard   Thank you v...

Thank you very much.

## Is there a program to go from 8 ...

Is there a program to go from 8 to 10?

## Is there a solution???...

Why is the following code not executed in MATLAB?
(because it is complex)

Is there a solution???

```% plot grid
t = linspace(-5, 5, 35);
n = linspace(-5, 5, 35);

% compute plot grid values
[T, N] = meshgrid(t, n);

% compute Z values
Z = (6.*exp(T)+6-sqrt(-18.*exp(T)-6))./(3+3.*exp(T));

% plot
surf(T, N, Z);
colorbar
```
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