答案1
您想使用嵌套aligned
:
\documentclass{article}
\usepackage{amsmath}
\DeclareMathOperator{\Aut}{Aut}
\begin{document}
\begin{equation*}
\begin{aligned}
\theta:\mathcal{E}(K|k)&\longrightarrow H^{1}(G,\Aut(V_{K})) \\
(V',x')&\longmapsto
\begin{aligned}[t]
p:G &\longrightarrow\Aut(V_{K}) \\
s&\longmapsto p_s=f^{-1}\circ s(f)=f^{-1}\circ s\circ f\circ s^{-1}.
\end{aligned}
\end{aligned}
\end{equation*}
\end{document}
最好用\colon
而不是:
;而且,在我看来,正常长度的箭更好。
\documentclass{article}
\usepackage{amsmath}
\DeclareMathOperator{\Aut}{Aut}
\begin{document}
\begin{equation*}
\begin{aligned}
\theta\colon\mathcal{E}(K|k)&\rightarrow H^{1}(G,\Aut(V_{K})) \\
(V',x')&\mapsto
\begin{aligned}[t]
p\colon G &\rightarrow\Aut(V_{K}) \\
s&\mapsto p_s=f^{-1}\circ s(f)=f^{-1}\circ s\circ f\circ s^{-1}.
\end{aligned}
\end{aligned}
\end{equation*}
\end{document}