修复交换图中的相交箭头

Question

以下是具有相交箭头的交换图的代码

\documentclass[12pt]{article}
\usepackage[pdftex,pagebackref,letterpaper=true,colorlinks=true,pdfpagemode=none,urlcolor=blue,linkcolor=blue,citecolor=blue,pdfstartview=FitH]{hyperref}

\usepackage{amsmath,amsfonts}
\usepackage{graphicx}
\usepackage{color}

\usepackage{tikz-cd}

\begin{document}

\[
\begin{tikzcd}[row sep=huge, column sep=huge]
    (X, \mathcal{T}) 
        \arrow{r}{\text{Id}_X} 
        \arrow{d}{q'} 
        \arrow[swap]{dr}{f_3 \circ q'} 
    & (X, \mathcal{T}) 
        \arrow{dr}{f_1 \circ q'} 
        \arrow{r}{\text{Id}_X} 
        \arrow{d}{q'} 
        \arrow{r}{\text{Id}_X} 
    &  (X, \mathcal{T}) 
        \arrow{d}{q} 
        \arrow{dl}{f_2 \circ q} \\
    (Y, \mathcal{T}) 
        \arrow{r}{f_3} 
    & (Y, \mathcal{T}) 
        \arrow{r}{f_1} 
        \arrow[r,<-,shift right,swap, "f_2"]{f_2} 
    & (Y, \mathcal{Q}) 
\end{tikzcd}

\]



\end{document}

生成以下内容。我的问题是如何让右侧方块上的文本看起来更好？

Answer 1

为了明确关联关系，你可以在斜坡上贴上标签。

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz-cd}
\DeclareMathOperator\Id{Id}

\begin{document}

\[
\begin{tikzcd}[row sep=huge, column sep=huge]
    (X, \mathcal{T}) 
        \arrow{r}{\Id_X} 
        \arrow{d}{q'} 
        \arrow[swap]{dr}{f_3 \circ q'} 
    & (X, \mathcal{T}) 
        \arrow[sloped,pos=.1]{dr}{f_1 \circ q'} 
        \arrow{r}{\Id_X} 
        \arrow{d}{q'} 
        \arrow{r}{\Id_X} 
    &  (X, \mathcal{T}) 
        \arrow{d}{q} 
        \arrow[sloped,pos=.3]{dl}{f_2 \circ q} \\
    (Y, \mathcal{T}) 
        \arrow{r}{f_3} 
    & (Y, \mathcal{T}) 
        \arrow{r}{f_1} 
        \arrow[r,<-,shift right,swap, "f_2"]{f_2} 
    & (Y, \mathcal{Q}) 
\end{tikzcd}
\]

\end{document}