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8h
comment Split “include graphics” on two pages but keep same Figure number
do as Harald says. If you use `\renewcommand\thefigure{1} then it will be hard to regain the normal numbering afterwards
8h
comment Why does Babel causes an error when used with PSPicture and LuaLaTeX?
do you need to use luatex, you could use latex or xetex and pstricks would work natively.
9h
comment Generating formats, compiling binaries
you could do either of those, just putting the binary back and rebuilding is easiest, if you rename and have both binaries you'd have to build any formats by hand as fmtutil won't know about them (unless you configure that to know about your knew binary, which must be possible but i've never done that:-)
11h
comment Visualize which \if this \fi associates to
presumably you mean \ifbook not /ifbook ?
11h
comment LATEX ERROR: BAD MATH ENVIRONMENT DELIMITER. (all caps)
+1 for being first (even though I'd have been quicker if not testing the example:-) yes $ is fine and has always been available as a robust form.
11h
comment LATEX ERROR: BAD MATH ENVIRONMENT DELIMITER. (all caps)
@HaraldHanche-Olsen sorry. you posted while I was making the example I think. It's easier to remember packages that you wrote:-)
11h
comment LATEX ERROR: BAD MATH ENVIRONMENT DELIMITER. (all caps)
@HaraldHanche-Olsen why hard to make a MWE ? (I posted one below)
11h
comment LATEX ERROR: BAD MATH ENVIRONMENT DELIMITER. (all caps)
No the question is archived forever on this site and should be self contained, please make a small self contained example and add it inline to your question. You will have a fragile command in a chapter title that should be guarded with \protect but without an example can't say more.
13h
comment mathbb generates strange characters for numbers and greek letters
you can declare both alphabets and use ams for letters and a different one for digits.
13h
comment How to set Overleaf to compile with `lualatex --shell-escape <file>`?
I'd be amazed if any public server hosted latex system allows --shell-escape.
17h
comment Control horizontal alignment of sub/superscripts
tricky with that syntax (or at least tricky not to break everything else) with a syntax \foo{x}{101}{1} it would be easy to measure the two scripts and pad the shorter one automatically.
19h
comment wrapfig - Make wrapped image respect margins and page ends
That presumably gave an overfull hbox warning: you need to tell tex how to hyphenate the word, tex has a hard job hyphenating pseudo-latin especially as here you are using the hyphenation tables for english.
20h
comment wrapfig - Make wrapped image respect margins and page ends
perhaps you want R rather than r ? (also not important for the question but [H] is from the float package not graphicx)
21h
comment Using expanded macro as search pattern for \patchcmd
\expandafter\selectpet\expandafter{\mychoice}
22h
comment Problems with own class
Please don't edit the question with the answer it makes the final archived version much harder to understand. there is no latex length called \footheight unless you define it, see Christian's comment
22h
comment Problems with own class
they are line numbers in your source file
22h
comment Problems with own class
simple typos: ` \headheigth` should be \headheight
22h
comment LuaLaTeX comma issue in math mode
Actually correction It should be OK after last night's update if you use the standard luatex in texlive (I was using the text 0.88 build)
22h
comment LuaLaTeX comma issue in math mode
A fix for this was pushed to ctan yesterday but I think it still is not right yet, we need to do some tests and I will report back. Sorry for teh inconvenience.
23h
comment Define path for packages in the LaTeX file (analog of \input@path or \graphicspath for \usepackage)
@cfr actually the underlying mechanism was written for \input and is part of the format, not any package (for mainframe and other systems which didn't have path searching) (\input@path) but no top level settings (there are some answers on site about that) adding \graphicspath to locally set \input@path for includegraphics was a throw-away afterthought just added at the time in case anyone should want it:-)