in my program, I keep assumptions in a set. Sometimes this is empty if no assumptions are used. This never caused a problem before (at least I do not think so, else I would have seen it) when using empty {} in assuming, except for now.

Here is one example below. Is this a known problem? I noticed when changing {} to [] the error goes away. I am not sure why, and if this is known issue. But will change from a set to a list to avoid this. 

Maple 2022.2 on windows 10

Download feb_14_2023.mw

What is the logic behind this?

expr:=(c[2]+x)^3;
simplify(expr)

Which is what expected. But 

expr:=(c[2]+x)^3+a;
simplify(expr)

gives

Which does not look simpler to me. I expected it to be the same as before but with "a" added.  This is what Mathematica gives for comparison

I know I can use simplify with size option. But my question is, how did Maple decide that x^3 + 3*x^2*c[2] + 3*x*c[2]^2 + c[2]^3 + a is "simpler" than (c[2] + x)^3 + a ? It must use some logic which I am trying to understand.

Maple 2022.2 on windows 10

I've probably asked about this long time ago but I do not remember now. But it is still a problem any way in 2022.2

Compare these two results

code is

restart;

alias(seq(c[k] = _C||k, k = 0..10));
c[1]*h(x);
Int(c[1]*h(x),x);


restart;
c[1]*h(x);
Int(c[1]*h(x),x);

I tried with typesetting level as extended and standard and same result.

Is this a know issue? It is not a big deal as it only affects display but it will be nice to find why it happens when using alias.

after updating to latest Physics package, I find now latex geneated is invalid as it gives compile error.

I looked at old files I have and I see the latex generated before was correct. so something changed in the latex() command to cause this and now none of my files compile when I run my Maple program.

Before, same code used to generate this

 \left(-x^{2}+1\right) \left(y^{\prime}\right)^{2} = 1-y^{2} 

which compiled correctly.

Here is worksheet
 

The error from the latex compiler is 

\documentclass[12pt]{book}
\usepackage{breqn}
\usepackage{amsmath}
\begin{document}

\begin{dmath*}
\left(-x^{2}+1\right) y^{\prime}^{2} = 1-y^{2}
\end{dmath*}

\end{document}

compiled using texlive lualatex command gives

(/usr/local/texlive/2022/texmf-dist/tex/latex/latexconfig/epstopdf-sys.cfg))
! Double superscript.
<recently read> \mathsup 
         
l.12 \left(-x^{2}+1\right) y^{\prime}^{2}
                                        = 1-y^{2}
? 

The fix is to keep same latex as before or use an extra {} like this  {y^{\prime}}^{2} 

but I think \left(y^{\prime}\right)^{2} looks better. But y^{\prime}^{2} is definitly wrong latex.

Download latex_problem.mw

Download error_jan_27_2023.mw