\documentclass[11pt,leqno]{amsart}

%\usepackage{amsthm}

\newcommand{\pathtotrunk}{./}
\input{text/article_preamble}
\input{text/top_matter}
\input{text/kw_macros}

%\title{Blob Homology}
\title{Sandbox}

\begin{document}

\mathfig{.6}{tempkw/left-marked-antirefinements}


$$
\begin{tikzpicture}
\fill (0,0) circle (.1);
\draw (0,0) -- (2,0);
\draw (1,0.1) -- (1,-0.1);

\draw [->,red] (1,0.25) -- (1,0.75);

\fill (0,1) circle (.1);
\draw (0,1) -- (2,1);
\end{tikzpicture}
\qquad
\begin{tikzpicture}
\fill (0,0) circle (.1);
\draw (0,0) -- (2,0);
\draw (1,0.1) -- (1,-0.1);

\draw [->,red] (1,0.25) -- (1,0.75);

\fill (0,1) circle (.1);
\draw (0,1) -- (1,1);
\end{tikzpicture}
\qquad
\begin{tikzpicture}
\fill (0,0) circle (.1);
\draw (0,0) -- (3,0);
\foreach \x in {0.5, 1.0, 1.25, 1.5, 2.0, 2.5} {
	\draw (\x,0.1) -- (\x,-0.1);
}

\draw [->,red] (1,0.25) -- (1,0.75);

\fill (0,1) circle (.1);
\draw (0,1) -- (2,1);
\foreach \x in {1.0, 1.5} {
	\draw (\x,1.1) -- (\x,0.9);
}

\end{tikzpicture}
$$
\end{document}