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此交换图中的对齐

tag-icon • tag-icon tikz-cd
此交换图中的对齐

我有这张图：

\begin{tikzcd}
 ... \arrow[r,""] 
& G_{n+1} \arrow[r, "\partial_{n+1}"] \arrow[rd, "f\circ \partial{n+1}"']
& G_{n} \arrow[rd, "g\circ \partial_{n}"'] \arrow[r,"\partial{n}"] \arrow[d,"f"'] 
& G_{n-1} \arrow[r,"\partial_{n-1}"]  \arrow[d, "g"'] \arrow[rd, "f'\circ\partial_{n-1}"']
& G_{n-2} \arrow[r, "\partial{n-2}"] \arrow[d, "f'"'] \arrow[rd]
& ...\\  
& 
& M  & M 
& M &...
\end{tikzcd}

问题是：打印时f'\circ\partial_{n-1}会与向下箭头重叠，因为函数组合与箭头之间的距离太大rd。我该如何解决？

答案1

除了将标签移近对角箭头之外，我还会增大行和列的间距。

\documentclass{article}
\usepackage{amsmath,tikz-cd}

\begin{document}

\begin{tikzcd}[column sep=large,row sep=huge]
 \dots \arrow[r,""] 
& G_{n+1} \arrow[r, "\partial_{n+1}"] \arrow[rd, "f\circ \partial_{n+1}\!\!"']
& G_{n} \arrow[rd, "g\circ \partial_{n}\!\!"'] \arrow[r,"\partial{n}"] \arrow[d,"f"'] 
& G_{n-1} \arrow[r,"\partial_{n-1}"]  \arrow[d, "g"'] \arrow[rd, "f'\circ\partial_{n-1}\!\!\!\!"']
& G_{n-2} \arrow[r, "\partial{n-2}"] \arrow[d, "f'"'] \arrow[rd]
& \dots \\  
& 
& M  & M 
& M & \dots
\end{tikzcd} 

\end{document}

在此处输入图片描述

答案2

tikz最好的办法可能是增加行距和列距，这是 egreg 的解决方案。但是您也可以通过在标签后写选项来调整标签间距，例如yshift=.5ex或shift={(.5em,.5ex)}，并且可以通过在第一行中替换 来向右移动给定&列&[2em]。

示例输出

\documentclass{article}

\usepackage{tikz-cd}

\begin{document}

\begin{tikzcd}
  \cdots \arrow[r,""]
  & G_{n+1}
  \arrow[r, "\partial_{n+1}"]
  \arrow[rd, "f\circ \partial{n+1}"' yshift=.5ex]
  & G_{n}
  \arrow[rd, "g\circ \partial_{n}"' yshift=.5ex]
  \arrow[r,"\partial{n}"]
  \arrow[d,"f"']
  & G_{n-1}
  \arrow[r,"\partial_{n-1}"]
  \arrow[d, "g"']
  \arrow[rd, "f'\circ\partial_{n-1}"' shift={(.5em,.5ex)}]
  &[2em] G_{n-2}
  \arrow[r, "\partial{n-2}"]
  \arrow[d, "f'"']
  \arrow[rd]
  & \cdots\\
  & & M & M & M &\cdots
\end{tikzcd}

\end{document}

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