tikz-cd我的交换图中有 3 个意外错误，称为：
Package pgf Error: No shape named A is known. I think the culprit is a tikzcd arrow in cell 2-2.
如何解决这些错误的问题？
xi这个图形已经很不错了，但是如果我们能以某种方式制作出像这样长度的箭nu，那就完美了。
MWE 在这里：
\documentclass[oneside,english]{amsart}
\usepackage{tikz-cd}
\usepackage{stackengine}[2013-09-11]
\usepackage{graphicx}
\begin{document}
\begin{figure}
\begin{center} %8ex
% \resizebox{0.25\linewidth}{!}{
\begin{tikzcd}[row sep = 40pt, column sep = 40pt, ampersand replacement=\&]
\& K \& \& \& \\
G \arrow[end anchor={[xshift=-1ex]}]{ur}{\mbox{\scalebox{1.5}{$\varepsilon$}}} \arrow[end anchor={[xshift=-1ex]},swap]{dr}{\mbox{\scalebox{1.5}{$\delta$}}}\&
\arrow[from=A,start anchor={[xshift=-8ex]},end anchor={[xshift=-5ex]}]{r}{\mbox{\scalebox{1.5}{$\zeta$}}}
\& E_m \arrow{r}{\mbox{\scalebox{1.5}{$\mu$}}}\& E_\leq \arrow{r}{\mbox{\scalebox{1.5}{$\nu$}}} \& \mathcal{A}_\leq\\
\& D
\arrow[swap, xshift=-1.5ex,dashrightarrow,near end]{uu}{\mbox{\scalebox{1.5}{$\alpha_1$}}}
[midway]{\ldots}
[near start]{\mbox{\scalebox{1.5}{$\alpha_q$}}}
\arrow[swap, xshift=1.5ex,dashrightarrow]{uu}
\arrow[uu, phantom, xshift=1.6ex,"=:\mathcal{A}"{name=A,right}, midway]
\& \& \&
\end{tikzcd}
% }
\end{center}
\end{figure}
\end{document}
当前的 pdf 如下：
答案1
其实比这更简单：只需通过列间距返回即可：
\documentclass{amsart}
\usepackage{tikz-cd}
\usepackage{graphicx}
\begin{document}
\[
\tikzcdset{
every label/.style={
/tikz/auto,
/tikz/font=\everymath\expandafter{\the\everymath\textstyle},
/tikz/inner sep=+0.5ex},
}
% \resizebox{0.25\linewidth}{!}{%
\begin{tikzcd}[row sep = 40pt, column sep = 40pt, ampersand replacement=\&]
\& K \\
G \arrow[end anchor={[xshift=-1ex]}]{ur}{\varepsilon}
\arrow[end anchor={[xshift=-1ex]},swap]{dr}{\delta}
\& \&[-40pt] =:\mathcal{A} \arrow{r}{\zeta} \&
E_m \arrow{r}{\mu} \&
E_\leq \arrow{r}{\nu} \& \mathcal{A}_\leq\\
\& D \arrow[swap, xshift=-1.75ex,dashrightarrow,near end]{uu}{\alpha_1}
[midway]{\ldots}
[near start]{\alpha_q}
\arrow[swap, xshift=1.75ex,dashrightarrow]{uu}
\end{tikzcd}%
% }
\]
\end{document}
请注意我如何覆盖标签的选择。但我认为\scriptstyle最好使用默认的。\scripstyle
