\usetikzlibrary{patterns}

\begin{tikzpicture}

% fill the overlap area
\draw[black!0, pattern=north east lines, pattern color=black!15] (0cm, 0cm) rectangle (2cm, 2cm);
\node[anchor=base, text width=2cm, align=center] at (1cm, 1.4cm) {\textsc{Overlap Region}};
\node[anchor=base, text width=3cm, align=center, scale=0.5] at (1cm, 0.5cm) {\textsc{inconsistent theories}};

% draw the horizontal axis
\draw[thick, ->] (-3cm, 0cm) -- (4cm, 0cm) node[anchor=south west] {$n$};

% draw points
\node[anchor=north] at (-3cm, 0cm) {$\cdots$};
\filldraw[fill=white, draw=black] (-2cm,0cm) circle (2pt) node[anchor=north] {$-1$};
\filldraw[fill=white, draw=black] (-1cm,0cm) circle (2pt) node[anchor=north] {$0$};
\filldraw[fill=white, draw=black] (0cm,0cm) circle (2pt) node[anchor=north] {$1$};
\node[anchor=north] at (1cm, 0cm) {$\cdots$};
\filldraw[fill=white, draw=black] (2cm,0cm) circle (2pt) node[anchor=north] {$\rL$};
\filldraw[fill=white, draw=black] (3cm,0cm) circle (2pt) node[anchor=north] {$\rL+1$};
\node[anchor=north] at (4cm, 0cm) {$\cdots$};

% draw limits
\draw[->] (0cm, 2pt) -- (0cm, 2cm) -- (4cm, 2cm) node[midway, anchor=south west] {in-annihilators} node[anchor=north east] {$b_{n}$};
\draw[->] (2cm, 2pt) -- (2cm, 1.8cm) -- (-3cm, 1.8cm) node[midway, anchor=south east] {out-annihilators} node[anchor=north west] {$b^*_{\rL + 1 - n}$};

\end{tikzpicture}

% vim: ft=tex