@mmcdara I suppose (hope?!) that this is all about interactive use, in which case alias is often useful and I don't object to it. If it works for you, then that's great.

I tend to look at things in a more programmatic perspective, in which I prefer not to assign to names which I still want to use as if they were unassigned. I suppose my preference is for approaches that work reasonably in both interactive and programmatic scenarios, where "reasonably" often has a connotation of scaling efficiently (as well as being straightforward to program).

@biol Do you mean something like this?

Or do you want to proceed the other way (formulaically), starting with an odd number and computing an even square that might be subtracted?

If it's homework/assignment/coursework, then how much of this do you think your ought to figure out yourself?

Download odd_stuff2.mw

@nm That last aspect you mention is due to typesetting=extended. That is a problem with the normal output, and unrelated to the userinfo messages.

On my Maple 2021.2 for Linux (by default, with no initialization) I get standard returned by interface(typesetting) and do not see that issue when redirecting the normal output to a text file. I understand that on Windows it is different.

So you try could including the command,

   interface(typesetting=standard):

You could even put that command right before your writeto call which redirects to a file. (Your could also put another call right after your latter writeto call, if you want to reinstate an earlier setting.)

If that still doesn't work the I'd be interested to know whether the following works (retaining every separate execution group verbatim):

Download userinfo_redef2.mw

@Johan159 This call is crazy:

assign(sol1);

@lcz Nice challenge. I've got the initial frame's rendering to respect the stylesheet option (passed through). Getting the updates (upon dragging) to respect that is a bit more challenging. Hopefully I'll find a little time on the weekend.

I could believe that having larger (padded) vertex labels might make it easier to "grab" them for dragging.

Maple 2021 --  March 10
Maple 2020 --  March 12
Maple 2019 --  March 14  (Pi day)
Maple 2018 --  March 21

@AHSAN Please put your close follow-up queries and details here, instead of spawning a separate Question thread.

Please put followup details for this query here, in Comments/Replies, instead of submitting a separate Question thread.

@John2020 Is this the kind of thing you're after? (If so then please test with nontrivial examples of your own. It's easy to overlook cases when coding.)

Download para_deg.mw

Here is a simple revision of that AltDGI procedure, which handles Matrices as well as lists (of Graphs).

graph_interactive_table_acM.mw

@nm Ok, so you only need assertion-checking for the local-variable and return-value type checks of your own procedures. That's more detail.

In that case either of the ways I showed of temporarily disabling certain kinds of assertion-checking in your calls to Library code might help with the kind of example you've shown.

@nm You've written a little more about how you set it, but I was talking about how you need to use it. Without an adequate description of your usage requirements most answers will be guesses.

Do you have an example showing how it might be done standalone with UMFPACK, without use of Maple? That would be a useful first step, showing how (and whether) it could be done. If possible and provided, then a Maple custom external-calliing wrapper might be based upon it.

@Tokoro In future please put your more general query (along with specialized cases) in a single Question thread, instead of unhelpfully splitting the details and responses amongst several distinct Question threads.

Please stop submitting your queries as Posts, instead of Questions.