It is the normal behavior of Maple that nothing happens when you press save in the sense that you do not see very much going on (on the GUI). You should not get a "Popup" (i.e. file dialogue) but the file is saved to its original name and location.

Please clarify that file contents does not change after applying changes to a file and pressing save.

Can you provide this Mathcad equation expression in standard math notation

If Q and H are supposed to be vectors, this expression does not make sense to me

Your parameters do not match.

• Le is not in the original equation
• D[t] and D[b] are not functions in the original equation

You have resolve this before substitution and simplification can be performed

I have added a benchmark you have posted to the information of my computer.

Quite intersting.
 

Download Maple_-_computer-info_with_benchmark_.mw

For me it looks like that the author is ignored. I.e.: the search you performed is the same as without Author.

@sand15 

I was about to say no and suggest image processing programs like ImageJ, but the program you suggest is much better for occasional work, since it includes a scaling option.

Works really well!

@Carl Love 

Now the rendering becomes nice.

With transparency polar surface contour plots are possible for quantitative interpretatioin of 3dplots.

👍

@Carl Love 

Up to 24 spokes (15-degree steps) you are right, above the grid shows less spokes and is not regular spaced (e.g. grid=[7,30]). At larger steps the polar grid looks more like a spider web.

Appart from that, it is less work than I expected and the rendering is acceptable (IMO). 
@Jamie128 : What do you think?

p1 := plot3d([r, theta, (csc(theta)/r)^2], r = 0 .. 2, theta = -Pi .. Pi, coords = cylindrical, style = surface, shading = zhue):
p2 := plot3d([r, theta, 0], r = 0 .. 3, theta = -Pi .. Pi, coords = cylindrical, grid = [7, 25], color = white, thickness = 2, glossiness = 0, shading = none):
(2*Pi*i)/24:
seq([3.5*cos(%), 3.5*sin(%), 0, %], i = 0 .. 23):
p3 := plots:-textplot3d([%]):
plots:-display(p1, p2, p3, view = [-4 .. 4, -4 .. 4, 0 .. 99], axes = framed);

I found this collection of Maple benchmarks (quick search).

A quite pragmatic approach which gives some insight.

I would add a dsolve and a pdf case (both numeric) and conclusive ways to measure.

Cases should be simple enough to fit in a code snippet region.

The biggest challenge would be a solution to collect cases and data.

I support the idea of bench marking.

@Jamie128 

You could generate three 3d-plots

• your function
• a polar grid with a z-axis
• labels made with textplot3d

and display them with plots:-display and the option axes=none.

This would look like this (without labels)

I used Carls plot combined with

plot3d([r, theta, 0], r = 0 .. 3, theta = -Pi .. Pi, coords = cylindrical, shading = zhue, view = 0 .. 99, shading = none).

The problem here is obvious: There is no control over the grid size of the polar grid.

The only way I can think of is to use plottools to generate all the rings and spokes of the polar grid yourself in 2d and transform them into 3d plot with plottools:-transform.

Quite some work which calls for a (selfmade) plot routine. Maybe someone capable can give us an idea how this should  be done.

@Axel Vogt 

I have two licenes which I use for my work installation and a traveling installation (both are laptops).  When updating to a newer version of Maple I downloaded the installer with the link provided by Maplesoft (a download per laptop). One installation went well the other did not. I tried it (download and installation) several times with the traveling laptop.

I then copied the installer from the work laptop to an external drive and installed from there and it worked.

With newer versions of Maple I never had this issue again. Must have been 2021 or 2022. That's all what I recall. Both laptops are managed and I have no control over the system configuration and software deployments. So maybe something has changed in the meantime that I am not aware of.

@michele 

- Delete the installation file and download from the official site again the 64bit version.

- If this does not  work and Maple 2023.1 works on your deskop: If you still have the installation file on the deskop that successfully installed and worked, transfer it to the laptop and try to install this one.

I once (with an older version of Maple) could not successfully install Maple on a laptop and did the above (file transfer). Strangely, this worked in my case.

Can you provide a pde to the difference equation?

@michele 

If I understand correctly Maple 2021 worked. Did 2023.1 ever work or never on your new Laptop?

Anything particular about the installation folder, installation behind a proxi or admin rights?

When you start Maple 2023.1: What is written in the lower left corner of the Maple Window? You should either see Ready, Evaluationg or Opening worksheet.

How does the mouse cursor look like?

You might have this issue

https://www.mapleprimes.com/questions/236717-Slow-Opening-Of-Start-Page#answer295917

If so, you should turn off the start page as described in the link.

If not I would consider reinstallation of Maple.