I'd like to write an expression with several vectors:
$\vec{t} + \vec{a}$
I'd like the arrow to appear at the same level, but the t arrow appears higher than the a arrow. I tried with \overrightarrow but it's the same problem.
[Tex/LaTex] Vertically align vector arrows
arrowsvertical alignment
Related Solutions
The idea of using TikZ is good; but better yet is to use tikz-cd:
\documentclass[12pt]{article}
\usepackage{tikz-cd}
\begin{document}
\[
\begin{tikzcd}
F_1 \arrow{rr}{\phi_1} \arrow[two heads]{dr} && F_0 \arrow[two heads]{r}{\phi_0} & M \\
& \ker(\phi_0) \arrow[hookrightarrow]{ur}
\end{tikzcd}
\]
\end{document}
Since you can use \chemfig inside a tikzpicture environment, you can place the three compounds (forgive me if that's not the right name) inside \nodes and then use \draw to draw the arrows:
\documentclass{article}
\usepackage{chemfig}
\usetikzlibrary{positioning,calc}
\begin{document}
\definesubmol\Me[H_3C]{CH_3}
\begin{tikzpicture}[node distance=0cm and 2cm]
\node (A)
{\chemfig{R-C-[::-60]O-[::-60]C-[::-60]R}};
\node[above right=of A] (B)
{\chemfig{*6((-!\Me)=(-!\Me)-(-!\Me)=(-!\Me)-(-!\Me)=(-!\Me)-)}
};
\node[below right=of A] (C)
{\chemfig{CH_3CH_2-[:-60,,3]C(-[:-120]H_3C)=C(-[:-60]H)-[:60]C{(}CH_3{)}_3}};
\draw[-stealth] (A) -- ( $ (A.0)!0.5!(B.west|-A.0) $ ) |- (B.west) node[auto,pos=0.7] {i,j};
\draw[-stealth] (A) -- ( $ (A.0)!0.5!(C.west|-A.0) $ ) |- (C.west) node[auto,pos=0.7] {j};
\end{tikzpicture}
\end{document}
Best Answer
You can also do the following to avoid having to change any of the existing mathematical code.
You will have to modify the
\defcommand for the 'tallest' variable used.