7.57.1 Top new questions this week

7.57.1.1 Drawing rotated triangles inside triangles
7.57.1.2 Curly braces with subscript and superscript
7.57.1.3 How to format the first letter of a word differently?
7.57.1.4 Put text in shape with TikZ
7.57.1.5 Overlay a 0 with a
7.57.1.6 How to put a resistor between the + and - inputs inside of an opamp?
7.57.1.7 Cannot display "et al" in my citation
7.57.1.1 Drawing rotated triangles inside triangles

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615419

How to draw rotated triangles inside triangles as shown above? I know how to draw a triangle; But not able to draw that. I found a similar example fromhttps://latexdraw.com/tikz-shapes-triangle/ 
\... 
[tikz-pgf] [geometry] [shapes]
 
asked by huzaifa abedeen https://tex.stackexchange.com/landing/r/digest?cta=user&id=241506 15 votes
answered by SebGlav https://tex.stackexchange.com/landing/r/digest?cta=user&id=204164 14 votes
7.57.1.2 Curly braces with subscript and superscript

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615029

I'm looking for a way to write something like this: 
\lbrace A_i\rbrace _{i = 1}^{n} 
My goal is to put a subscript and a superscript near the right curly brace. How can I do it? The subscript and the ... 
[brackets] [subscripts] [superscripts]
 
asked by Gennaro Arguzzi https://tex.stackexchange.com/landing/r/digest?cta=user&id=106802 10 votes
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 14 votes
7.57.1.3 How to format the first letter of a word differently?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615108

I'm looking for a command, which would take a text and print it with the first letter formatted differently: 
\first{Hello, world!} 
Should be turned into: 
\textbf{\large H}ello, world! 
Is there a ... 
[formatting] [packages]
 
asked by yegor256 https://tex.stackexchange.com/landing/r/digest?cta=user&id=1449 9 votes
answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 12 votes
7.57.1.4 Put text in shape with TikZ

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615537

Explanations 
I try to put a text in shape to follow a figurea^\200\231s edge to get someting like this: 
(the red field is just given to explain) 
Current situation 
For the moment, this is my MWE 
\documentclass[... 
[tikz-pgf] [tikz-shape] [irregular-shape]
 
asked by fauve https://tex.stackexchange.com/landing/r/digest?cta=user&id=30933 8 votes
answered by hpekristiansen https://tex.stackexchange.com/landing/r/digest?cta=user&id=8650 0 votes
7.57.1.5 Overlay a 0 with a

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615331

How can I overlay a 0 with a | in latex to create a new symbol comprised of a 0 with a vertical line inside it? 
I've looked at the following post Overlay symbol with another and tried to adapt the ... 
[math-mode] [symbols] [overlays]
 
asked by Diogo Santos https://tex.stackexchange.com/landing/r/digest?cta=user&id=252026 8 votes
answered by Steven B. Segletes https://tex.stackexchange.com/landing/r/digest?cta=user&id=25858 14 votes
7.57.1.6 How to put a resistor between the + and - inputs inside of an opamp?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615396

I want to redo this image: 
but the resistors inside the opamp isnt well rendered, because I cant position well the components. 
The MWE 
\documentclass{article} 
\usepackage{circuitikz} 
\begin{... 
[tikz-pgf] [positioning] [circuitikz]
 
asked by corie https://tex.stackexchange.com/landing/r/digest?cta=user&id=251867 7 votes
answered by Zarko https://tex.stackexchange.com/landing/r/digest?cta=user&id=18189 8 votes
7.57.1.7 Cannot display "et al" in my citation

https://tex.stackexchange.com/landing/r/digest?cta=question&id=615193

For my dissertation I want to use the Harvard referencing style. 
So in my document I have a line as follows; 
The most important paper published in relation to NLP Transformers is \citep{aiayn} 
and ... 
[bibtex]
 
asked by arame3333 https://tex.stackexchange.com/landing/r/digest?cta=user&id=251347 7 votes
answered by Markus G. https://tex.stackexchange.com/landing/r/digest?cta=user&id=118712 8 votes