Hello admins. Can you please guide me on what's going wrong with my post? I just posted and now my post has been deleted or vanished?

Hello Everyone,

First off, thank you all for your help previously, it helped me a lot!
Today, I am struggling with another small question and I wonder if there is an easy way to do it:

I am working on a problem where I have to vary values of a 4x4 Matrix until its determinant becomes zero (and the answer to the linear equations system is no longer the trivial one...)
All values depend on a single value (kx) that I can iteratively change to get it where it needs to be.

Now I would start to write a while-loop where it would change the value according to the determinant, incl. sign changes etc.
Before I get into this, I was wondering if maybe Maple has some sort of Built-In Function that could do this for me. 
(I could not find anything via the Maple Help/Google, so I thought I could ask.)

Best Regards,
Lennart
 

Got here a  function g(y,z) and if the partial directive with respect to y is 0 , then  there is left over a function h(z)
Can this ber proven in Maple, can't figure it out by reasoning. 
Perhaps a geometrical explanation makes more sense ?  

I'm using Maple 2020 in Linux (Ubuntu 20.04). The screen resolution is 2560×1440, so I have system-wide setting of 200% scaling for all apps, but unfortunately Maple doesn't adopt the system setting and UI elements are tiny. To make it tolerable, in "Tools - Options - Interface", I've set Default Zoom to be 200% and checked the box "Large toolbar icons". However, menus (File, Edit, View etc.) and dialog boxes are still tiny.

Am I right that the Maple GUI is written in Java / Swing? I've heard that Java 9 has better support for high dpi scaling. Does the default Maple installation use Java 9?

I am porting some code I have  from Mathematica to Maple. 

In Mathematica, there is a command https://reference.wolfram.com/language/ref/CopyDirectory.html  which copies directory tree (i.e. the directory and everything below it) to a new location on the file system.

I looked at FileTools, and the Copy command there only works on files, not Directories.

"An exception is raised if source is a directory."

There must be a command in Maple to do this basic operation, but I am not able to find it. I googled.

Note: I do not want to rename the directory, but to copy it.

I could ofcourse work around this by writing code or calling system, but I would expect Maple to have a command for this somewhere.

Will Chebyshev differential equation always give  the series solution or not.?

Chebyshev differential equation have variable coefficient,Can we solve it without using any series solution method.

A question about the alias command: Can the abbreviation u[k] of the function call u[k](x, y) be implemented by the alias command, so that the type of u[k] is a function for any integer K?

example:
alias(F[k]=F[k](x));
output:F[k].
whattype(F[k]);
output:function
whattype(F[1]);
output:indexed
I want f[k] to be a function for any integer K. how to implement it? If there are experts to see this question to help answer, will be very grateful!

i want to make a costomized procedure to calculate laplace transform.please guide me why wont MAPLE calculate the limit?  I will use this procedure to make another integral transform so I can not use built-in Laplace Transform commands.

maple.mw

How to plot graphs on the xyz axes? Can somebody tell me step by step

How to evaluate the integration when ?

integration_24sep.mw

I am trying to solve a set of ODEs with dsolve. There are 26 equations of my ODEs, but the problem is a multiple point bvp. So the range is divided into three region. In order to use dsolve, I transform the three subregion's coordinate into 0 to 1. Meanwhile, the ODEs are different in three regions, respectively. So, there are 26×3 equations in total. And according to the paper I want to replicate, it says the response is unstable,so parameter continuation is used. Similar to the paper, an additional equation is added(eq1_27 in code), also an additional condition is added(about lambda). When the lambda is less then 0.11, the dsolve works, but for other values it doesn't work. Could anyone help me?

Sorry for the tedious programming code, I am new to Maple.

Hi!

I would like to write an automated code, this means that I would like not to copy and paste anything.
 

4.22647099771398*exp(-0.0104163888375266*t) - 4.22647099771398*exp(-2.00033505979518*t)

I have this as my last result and would like to use the value of the exponential function (0.0104163888375266 and 2.00033505979518) without having to manually copy and paste it into the next function.

How can i do this?

Thank you in advice for your help! :)

Hi

I am trying to create a simulation of a UR5e, I have added a spring dampening systen in order to simulate the imput of external forces and torques. However I get a strange error for which I could not find an awnser for on the web.

The closest was 

https://www.mapleprimes.com/questions/203860-Compile-Maplesim-Model-To-Ccode

However it is quite old and not entirely a match. 

I get the following output

More information

Maplesim 2020

64 bit version

Windows 10

RAM - 16 GB

Do anybody know a solution for this?

Mvh

Eric Ragnarsson