T_EX

Unicode

1. Open F-branes (2110.13010)
2. Chiral string theories as an interpolation between strings and particles (2109.10401)
3. S-matrices from 4d worldvolume (2012.12938)
4. F-theory amplitudes (2010.14590)
5. F-theory superspace backgrounds (1910.01710)
6. O(D,D) gauge fields in the T-dual string Lagrangian (1810.04761)

Proofreading .tex files is easier if Greek & math characters already appear as such there. I used to deal with these characters using extended ASCII in Mac OS Roman encoding & viewing with my own font. I replaced that with the more modern utf-8 (Unicode) & viewing with standard Unicode fonts. (This approach works on all platforms.) Utf-8 has 17×2¹⁶ characters, compared to the measly 2⁸-character extended ASCII, so this allows almost all math symbols, excluding super/subscripts (except for numerals & signs), to appear literally before processing. So far it seems LuaLaTeχ is the most convenient for adding new characters: e.g., \catcode`§=13 \def §{\section}.

For (@ least) TeXShop on the Mac, the .tex source file would begin with (before \documentclass)

% !TEX program = lualatex
% !TEX encoding = UTF-8 Unicode

Also, LaTeχ packages have already been written to recognize Unicode math, not just foreign languages: E.g., such a LuaLaTeχ file might begin

\documentclass[12pt]{article}
\usepackage{amsmath}			% needed for align & subeqs; must load before unicode-math
\usepackage[math-style=ISO,colon=literal]{unicode-math}
%	\setmathfont{STIX Two Math}	% most characters; Times-like
%	\setmainfont{XITS}
%	\setsansfont{TEX Gyre Heros}

a-Shell

• the usual Files folder picker: pickFolder (followed by return ↩︎),
• the usual tex commands: lualatex (or whichever you favor) & bibtex (if you use that), followed by the filename (& return ↩︎),

But I wanted a little customization: To use an iCloud folder for personal texinputs (incl. luainputs), you need to put a .profile (suggested by the author) something like this in ~/Documents in the a-Shell sandbox (the folder where a-Shell starts):

jump inputs
cd -
setenv TEXINPUTS .:/private/var/mobile/Library/Mobile\ Documents/com~apple~CloudDocs/Documents/tex/inputs//:
setenv LUAINPUTS .:/private/var/mobile/Library/Mobile\ Documents/com~apple~CloudDocs/Documents/tex/inputs//:
setenv BIBINPUTS .:/private/var/mobile/Library/Mobile\ Documents/com~apple~CloudDocs/Documents/tex/inputs/bib//:
setenv BSTINPUTS .:/private/var/mobile/Library/Mobile\ Documents/com~apple~CloudDocs/Documents/tex/inputs/bst//:
alias b bibtex
alias f pickFolder
alias j jump
alias l lualatex
alias p pwd
alias s showmarks

• Some non-standard stuff:
  • help: intro, incl. non-standard commands
  • help -l: full list of commands
• Some minimal Unix stuff (look it up):
  • moving -- cd, pwd, ls
  • files -- cp, mv, rm
  • reading -- cat, more, man
  • setenv
  • alias
• Some "sophisticated" Unix stuff, moving with bookmarks:
  • pickFolder automatically sets bookmarks
  • zshmarks: bookmark, showmarks, jump, renamemark, deletemark
  • Settings preference for bashmarks: s, l, g, r, d

• Files in iCloud that haven't been downloaded (in Files they appear with a ☁️ with a ⬇︎, next to the name) do not show up in ls, & in ls -a show with an extra .icloud extension. You may need to download them in Files (by clicking on that cloud icon) to get tex to find them.
• pickFolder & jump are the only ways to avoid iOS sandboxing.
• The top of the virtual keyboard has keys for tab (⇥), control- (⌃), & escape (⎋), as well as arrow keys.
• Close a window: exit (& return ↩︎). However, this will delete your history (of previous commands).

Math accents, etc.

\AtBeginDocument{\directlua{require("combining_preprocessor.lua")}}

% accent over:
\def\on#1#2{{\buildrel{{\mkern2.5mu\raise-.1em\hbox{$\scriptstyle#1$}\mkern-2.5mu}}\over{#2}}}
\def\ron#1#2{{\buildrel{{\raise-.1em\hbox{$\scriptstyle#1$}}}\over{#2}}}	% for unitalicized
\def\dt#1{\on{\hbox{\bf .}}{#1}}						% (big) dot over: see  ̇  below  
\def\ddt#1{\on{\hbox{\bf .\kern-1pt.}}#1}					% double dot: see ¨ below
\def\under#1#2{\mathop{\null#2}\limits_{#1}}					% accent under

% otherwise undefined utf-8

\catcode`❴=13	\def ❴{\{}			% Option-{
\catcode`❵=13	\def ❵{\}}			% Option-}
\catcode`√=13	\def √{\sqrt}			% Option-M
\catcode`§=13	\def §{\section}		% Option-i
\catcode`¶=13	\def ¶{\subsection}		% Option-I
% spaces
\catcode`⎵=13	\def ⎵{\nobreak\ }				% Option-0
\catcode`⸏=13	\def ⸏{\quad}					% Option-)
%\catcode`␣=13	\def ␣{\TextOrMath{\thinspace}{\,}}		% (open box)
\catcode`˽=13	\def ˽{\TextOrMath{\thinspace}{\,}}		% Option-space (modifier letter shelf)
% combining characters
\def\̂#1{\TextOrMath{#1̂}{\hat{#1}}}		% Option-6
\def\̌#1{\TextOrMath{#1̌}{\check{#1}}}		% Option-V
\def\̃#1{\TextOrMath{#1̃}{\tilde{#1}}}		% Option-n
\def\́#1{\TextOrMath{#1́}{\acute{#1}}}		% Option-~
\def\̀#1{\TextOrMath{#1̀}{\grave{#1}}}		% Option-`
\def\̇#1{\TextOrMath{#1̇}{\dt{#1}}}		% Option-;
\def\̈#1{\TextOrMath{#1̈}{\ddt{#1}}}		% Option-:
\def\̆#1{\TextOrMath{#1̆}{\breve{#1}}}
\def\̄#1{\TextOrMath{#1̄}{\bar{#1}}}		% Option--
\def\̊#1{\TextOrMath{#1̊}{\mathring{#1}}}		% Option-A
\def\⃗#1{\vec{#1}}				% Option-R
\def\⃡#1{\overleftrightarrow{#1}}			% Option-E
\def\⃖#1{\overleftarrow{#1}}			% Option-W
\def\̸#1{\slashed{#1}}				% Option-/
% with single character only
%\def\͞#1{\overline{#1}}				% (combining double macron)
\def\̅#1{\overline{#1}}				% Option-? (combining overline)
%\def\̱#1{\underline{#1}}			% (combining macron below)
\def\̲#1{\underline{#1}}				% Option-_ (combining lowline)
%\def\͡#1{\widehat{#1}}				% (combining double inverted breve)
\def\᷍#1{\widehat{#1}}				% Option-^ (combining double circumflex above)
\def\͠#1{\widetilde{#1}}				% Option-N

Hyperref

\usepackage{hyperref}
\hypersetup{
	bookmarksnumbered,		% (sub)section numbers in bookmarks
	unicode,			% use with \texorpdfstring
	colorlinks,			% avoid stupid boxes
	citecolor=[rgb]{.9,0,.5},	% \cite
	urlcolor=[rgb]{0,0,1},		% \href
	linkcolor=[rgb]{0,.7,0}		% \ref , toc
	}

BibT_EX

\bibliographystyle{utphys}

A recently improved version from Dharmesh Jain is hephys.bst.

To avoid doing pdflatex, bibtex, pdflatex, pdflatex, move the latexmk engine from ~/Library/TeXShop/Engines/Inactive/Latexmk/ to .../Engines/. The only menu item it will appear in is the Program list in the source window bar (so you'll need that button as well as the Typeset one). Or begin the file with

%% !TEX program = latexmk

Miscellaneous LaTeX stuff

• In equation arrays, when aligning @ = signs, use &= or ={}& to get spacing right.

• \usepackage{cite}	% for citations like [1-10] & not [1,2,3,4,5,6,7,8,9,10]

• \usepackage{slashed}	% Feynman: see  ̸ above

• \usepackage{microtype}	% fewer hyphens, etc.

• For graphics files,
  • \usepackage{graphicx}, with commands like \includegraphics[width=1.5in]{foo}
  • or more simply, for pdftex, define commands like

    \def\fig#1{\pdfximage {#1}\pdfrefximage\pdflastximage}
    \def\figscale#1#2{\pdfximage width#2 {#1}\pdfrefximage\pdflastximage}
    

  • or for luatex

    \def\fig#1{\saveimageresource {#1}\useimageresource\lastsavedimageresourceindex}
    \def\figscale#1#2{\saveimageresource width#2 {#1}\useimageresource\lastsavedimageresourceindex}
    

  • If you want math/text alongside a figure, put it all in an equation, and put the figure command inside \vcenter{\hbox{...}}.
• To get equations numbered by subsection,

  \catcode`@=11
  \@addtoreset{equation}{section}
  \catcode`@=12
  \numberwithin{equation}{subsection}
  

  or just \numberwithin{equation}{section} for section.
• Because I tire of typing environment commands:

  \def\eq#1{\begin{equation}#1\end{equation}}
  \def\al#1{\begin{align}#1\end{align}}
  \def\se#1{\begin{subequations}\begin{align}#1\end{align}\end{subequations}}
  \def\ma#1{\begin{pmatrix}#1\end{pmatrix}}

• \perp (⟂) isn't defined in unicode-math, so you have to use \mathrel\bot instead. This bug has been known for 8 yrs. & still hasn't been fixed.

Slides

\documentclass[12pt]{article}
% for landscape
\pdfpagewidth=11in \pdfpageheight=8.5in
\textwidth=10in	\textheight=7.5in
\topmargin=-1in
\oddsidemargin=-.5in \evensidemargin=-.5in
\parindent=0in
% so people won't keep asking, "How much more do you have?" e.g., for 11 slides
\setcounter{page}{-10}
\begin{document}
% big, bold, san serif
\Huge\sffamily\bfseries\boldmath

Local stuff

You may also want the shield by itself for other purposes, so here's shield.pdf.