equationshyperref
In a document at my workplace, \autoref is redefined in the following way:
\renewcommand{\autoref}[1]{\cref{#1}}
I suppose this is important because it probably means that I cannot just overwrite \equationautorefname.
For equations, this results in something like "Equation (5.1)". The parenthis are fine when they are shown next to the equation, but in the text we want them to be displayed without the parenthesis.
How can I achieve this?
Welcome to TeX.SE!! I think this is a possible solution, but I'm not very sure about you point 2. I don't know how the lines must 'indicate the number of indices'.
However I hope this helps. I made two pics. I call the first vlines which draw those vertical lines that must 'indicate the number of indices'. This pic takes a parameter: the number of lines to draw. If it's not present draws exactly 2 lines. The second pic, underbracket draw a line connecting two nodes (created in the equations with \tikzmarknode). This pic needs four parameters: end point, x shift in the initial point, x shift in the final point and y shift.
Something like this:
\documentclass {article}
\usepackage {lipsum}
\usepackage {tikz}
\usetikzlibrary{calc}
\usetikzlibrary{tikzmark}
\tikzset
{
pics/vlines/.default=2,
pics/vlines/.style={% #1 -> number of lines (default 2)
code={%
\foreach\i in {1,...,#1}
\draw[pic actions] (-0.05*#1+0.1*\i-0.05,-0.25) --++ (0,-0.25);
}},
pics/underbracket/.style n args={4}{% end point, initial delta x, final delta x, delta y
code={%
\draw (#2,-0.6) --++ (0,-#4) -| ($(#1)+(#3,-0.6)$);
}},
}
\begin{document}
\lipsum[1] See equation \ref{eq:1}.
\begin{equation}\color{blue}
\tikzmarknode{F1}F_*^T \cdot
\tikzmarknode{E1}E \cdot
\tikzmarknode{F2}F_*=
\tikzmarknode{F3}F_*^T \stackrel{2}{*}
\tikzmarknode{F4}F_*^T \cdot
\tikzmarknode{E2}E,\label{eq:1}
\end{equation}
\begin{tikzpicture}[remember picture,overlay]
\foreach\i in {F1,E1,F2,F3,F4,E2}
\pic at (\i) {vlines};
\pic at (F1) {underbracket={E1}{ 0} {-0.025}{0.5}};
\pic at (E1) {underbracket={F2}{ 0.025}{0}{0.5}};
\pic at (F3) {underbracket={E2}{ 0} { 0.025}{0.75}};
\pic at (F4) {underbracket={E2}{ 0.025}{-0.025}{0.5}};
\end{tikzpicture}
\vspace*{1cm}% space for the overlay picture
\lipsum[2] See now equation \ref{eq:2}.
\begin{equation}
(\tikzmarknode{A}A \stackrel{4}{*}
\tikzmarknode{C}C \stackrel{2}{*}
\tikzmarknode{E}E) \stackrel{3}{*}
\tikzmarknode{B}B = \cdots\label{eq:2}
\end{equation}
\begin{tikzpicture}[remember picture,overlay]
\foreach\i in {A,E,B}
\pic at (\i) {vlines};
\pic[red] at (C) {vlines={4}}; % four (red) lines (default 2)
\pic at (A) {underbracket={C}{0 }{-0.05}{0.25}};
\pic at (C) {underbracket={E}{0.05}{ 0 }{0.5}};
\pic at (C) {underbracket={B}{0 }{ 0 }{0.75}};
\end{tikzpicture}
\vspace*{1cm}% space for the overlay picture
\lipsum[3]
\end{document}
Edit: I changed the second pic for a style inspired in Andrew Stacey's answer in this post. It does the same but I think that the syntax is a little bit clearer.
And the new code:
\documentclass {article}
\usepackage {lipsum}
\usepackage {tikz}
\usetikzlibrary{calc}
\usetikzlibrary{tikzmark}
\tikzset
{
pics/vlines/.default=2,
pics/vlines/.style={% #1 -> number of lines (default 2)
code={%
\foreach\i in {1,...,#1}
\draw[pic actions] (-0.05*#1+0.1*\i-0.05,-0.25) --++ (0,-0.25);
}},
% idea taken from Andrew Stacey's answer: https://tex.stackexchange.com/questions/609102
underb/.style n args={3}{% initial delta x, final delta x, delta y
to path={++(#1,-0.6) --++ (0,-#3) -| ($(\tikztotarget)+(#2,-0.6)$)}
}
}
\begin{document}
\lipsum[1] See equation \ref{eq:1}.
\begin{equation}\color{blue}
\tikzmarknode{F1}F_*^T \cdot
\tikzmarknode{E1}E \cdot
\tikzmarknode{F2}F_*=
\tikzmarknode{F3}F_*^T \stackrel{2}{*}
\tikzmarknode{F4}F_*^T \cdot
\tikzmarknode{E2}E,\label{eq:1}
\end{equation}
\begin{tikzpicture}[remember picture,overlay]
\foreach\i in {F1,E1,F2,F3,F4,E2}
\pic at (\i) {vlines};
\draw (F1) to[underb={0 }{-0.025}{0.5}] (E1);
\draw (E1) to[underb={0.025}{ 0 }{0.5}] (F2);
\draw (F3) to[underb={0 }{ 0.025}{0.75}] (E2);
\draw (F4) to[underb={0.025}{-0.025}{0.5}] (E2);
\end{tikzpicture}
\vspace*{1cm}% space for the overlay picture
\lipsum[2] See now equation \ref{eq:2}.
\begin{equation}
(\tikzmarknode{A}A \stackrel{4}{*}
\tikzmarknode{C}C \stackrel{2}{*}
\tikzmarknode{E}E) \stackrel{3}{*}
\tikzmarknode{B}B = \cdots\label{eq:2}
\end{equation}
\begin{tikzpicture}[remember picture,overlay]
\foreach\i in {A,E,B}
\pic at (\i) {vlines};
\pic[red] at (C) {vlines={4}}; % four (red) lines (default 2)
\draw (A) to[underb={0 }{-0.05}{0.25}] (C);
\draw (C) to[underb={0.05}{ 0 }{0.5}] (E);
\draw (C) to[underb={0 }{ 0 }{0.75}] (B);
\end{tikzpicture}
\vspace*{1cm}% space for the overlay picture
\lipsum[3]
\end{document}
Best Answer
The presence of
\crefin your question suggests the use ofcleveref; in this case, use \crefformat to (re)format how the aspect of the cross-reference should be:\textupmakes sure the equation number will always be upright.By the way, instead of redefining
\autoref, it would be better perhaps to define your own new command.