如何在 LaTex 中制作这个概念依赖方向符号？

Question

我尝试了几种使用大括号和箭头的方法，但都无法奏效。提前致谢。

Answer 1

一个pstricks办法：：

\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}%
\usepackage{lmodern}
\usepackage{ pstricks-add}
\usepackage{auto-pst-pdf}

\begin{document}

\begin{pspicture}
    \psset{linewidth=0.6pt, arrows=->, arrowinset=0.15, arrowsize=2pt 2.5, angleB=180, linejoin=1}
     \pnodes(-1.5,0){C}(0,0){D} \pnode(0,-1){B’}\pnode(3,1){A}\pnode(3,-1){B}
    \ncline{D}{C}\ncangle[angleA=90]{D}{A}
    \psset{arrows=-}
    \ncangle[angleA=-90]{D}{B}
    \psline[ ArrowInside=-<, ArrowInsidePos=0.95](B’)(B)
    \nput[labelsep=2ex]{135}{D}{D}
    \nput{180}{C}{Some text}
\end{pspicture}

\end{document} 

Answer 2

帮助您设计自己的 MWE：

\documentclass[border=3mm,
               tikz,
               preview
               ]{standalone}
\usetikzlibrary{arrows.meta,
                decorations,decorations.markings,
                }

\begin{document}
    \begin{tikzpicture}[>  = {Stealth[]},
decoration={markings,mark=at position 0.1 with {\arrow{>}}}
                        ]
\draw[postaction={decorate},->]    (1,0) -| (0,1) -- (1,1);
\draw[->]   (0,0.5) node [above left] {D} -- + (-1,0);
    \end{tikzpicture}
\end{document}

上面的代码给出：