兩個圓之間的彎曲箭頭

Question

我想知道是否可以在 Latex 中製作這種圖表：

這問題似乎是一個很好的起點，但我不知道如何用圓圈取代節點。另外，我找不到任何在圓的周長上做標記的說明，如我的繪圖所示。謝謝你的幫忙！

Answer 1

\documentclass[french]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[a4paper]{geometry}
\usepackage{babel}
\usepackage{amsmath,amsthm, amssymb, latexsym}
\usepackage{tikz}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\draw[thick] (0cm,0cm) circle(1cm);
\draw[thick] (3cm,0cm) circle(1cm);
\path node[anchor=south] at (0,1) {e};
\path node[anchor=north] at (0,-1) {b};
\path node[anchor=east] at (-1,0) {ab};
\path node[anchor=west] at (1,0) {a};
\path node[anchor=south] at (3,1) {eH};
\path node[anchor=north] at (3,-1) {bH};
\path[->] (-1,0) edge [out=-120, in=220] (3,-1);
\path[->] (0,-1) edge [out=-20, in=200] (3,-1);
\path[->] (0,1) edge [out=20, in=-200] (3,1);
\path[->] (1,0) edge [out=40, in=170] (3,1);
\end{tikzpicture}
\end{document}