I was wondering how I could draw something like this in TIKZ? I have an axis with numbers, but I would like the letters and the arrows...
\documentclass{amsart}
\usepackage{tikz}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{arrows}
\begin{document}
\tikzset{->-/.style={decoration={
markings,
mark=at position #1 with {\arrow{<}}},postaction={decorate}}}
\begin{tikzpicture}
% a straight line segment
\draw[latex-] (-2,0) -- (0,0);
\draw[->-=.6] (0,0) -- (1,0);
\draw[-latex] (1,0) -- (2,0);
% the ticks and their labels
\foreach \x in {-1,...,1}
\draw[xshift=\x cm] (0pt,2pt) -- (0pt,-1pt) node[below,fill=white] {\the\numexpr\x +1\relax};
\end{tikzpicture}
\end{document}

