I use  

Typesetting:-Unsuppress('all'):
Typesetting:-Settings(prime=t,'typesetprime'=true):

to make the math easier to read. (also the latex looks better this way).

But it has no effect when on the plot title. Here is screen shot and code

In this below, I get same title if I use   plot(t,'title'=typeset(the_title));   or plot(t,'title'=the_title);  Instead of dy/dt,  I wanted it to show as y'(t) like it does in worksheet.

Is there a way to make the title of the plot show the math in the nicer format shown in the worksheet automatically? It looks like Typesetting:-Settings does not extend to plots, which is too bad.

code

the_title:=diff(y(t),t$2)+c*diff(y(t),t)+k*y(t)=0;
Typesetting:-Unsuppress('all'):
Typesetting:-Settings(prime=t,'typesetprime'=true): #this says to use y'(t) instead of dy/dt    

plot(t,'title'=typeset(the_title),size=[300,300]);

#or

plot(t,'title'=the_title,size=[300,300]);

Is this a Maple bug? I do not see what I am doing wrong:

Moving any slider gives the internal error.  Why?

Download internal_error_explore_feb_28_2026.mw

Here is a small movie

To help debug things, and to make it easier to add more logic such as if then else and so on, I moved the main body of Explor to a separate proc where the plot is made after doing some checking.

So instead of writing

Explore(plot(.....), 
 parameters=[  
   [c=0..10,....],
   [k=0..10,...]]
)

It now became

foo:=proc(c,k}
.....#some debug print messages added here, and some checking...
   plot(....)
end proc;

Explor( foo(c,k), 
  parameters=[  
    [c=0..10,....],
    [k=0..10,...]]
)

Two problems. 

1) My print lines inside foo() do not print to worksheet. Only the initial time they do. When I mean initial time, it is when Explore starts and does initalization. I see the print lines only then.

But after that, as I change the slider, which should make a call to foo(), I see nothing printed on the screen in my worksheet any more.

It is as if Explor stopped calling my foo().  But at same time, I see do see in the the display of Explore itself that it is calling foo as expected, since the call it display is changes and the result of the call changes as slider is changed. So call is being made. 

This is what shows inside Explore...

foo(5,2)=10
foo(3,2)=6
and so on

Why then the print messages from foo() are not printed in the worksheet any more? Where are the print message going to then?

2) How to make Explor only show the _result_ of calling foo() and not show the call itself as it does now? 

ie. instead of showing foo(5,2)=10  I just wanted to see the result of foo, which is 10 in this example.

Doing rhs(foo(c,k)) did not work

Here is worksheet to see yourself.

Download explore_feb_28_2026.mw

Here is small movie

ps. I am thinking now Explore only works with "plot" as its first argument. But help says expr can be anything.

given

ode:=x^2*diff(y(x),x)+cos(2*y(x)) = 1; 
ic:=y(infinity) = 5/4*Pi; 
mysol:=cot(y(x))=2/x+1;

the above solution is verified against the ode, but Maple do not give zero for the IC part. It gives 

                                 [0, -Pi*_Z6 + Pi]

But we can see the IC are verified also

limit(eval(mysol,y(x)=5/4*Pi),x=infinity)

Gives

                                    1 = 1

my  code checks if the entry in the result of odetest is zero or not. Hence for -Pi*_Z6 + Pi it thinks now the solution is wrong because it is not zero.   Ofcourse looking at it on the screen, we see that for _Z6=1 then it becomes zero.  

The question, why Maple odetest do not return zero for the IC part?

eq:=cot(y)=-A;
solve(eq,y)

eq:=cot(y)=A;
solve(eq,y)

I would expect solution to first to be arccot(-A) and for second to be arccot(A) but Maple likes to write the solution for the first one as Pi-arccot(A).

Of course Maple solution is correct. But why make it so complicated? Why not just give arccot(-A) as solution?  A is just a symbol.

I tried 4 different cas systems and they all give arccot(-A) for first one, except Maple gives Pi-arccot(A)

Is there some subtle reason why Maple gives solution like this instead of the simpler one? 

And is there a way to tell Maple not to do this? This seems to be something hardcoded internally in its automatic trig simplifications? I just do not see the point of writing it this way. May be someone knows why.