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+.TH RIPSER 1
+.SH NAME
+ripser \- fast computation of persistent homology of flag complexes
+.SH SYNOPSIS
+.B ripser
+[\fB\-\-help\fR]
+[\fB\-\-format\fR \fIformat\fR]
+[\fB\-\-dim \fIk\fR]
+[\fB\-\-threshold \fIt\fR]
+[\fB\-\-ratio \fIr\fR]
+[\fIfilename\fR]
+.SH DESCRIPTION
+.B ripser
+computes persistent homology of flag complexes (such as Vietoris-Rips
+complexes) only, allowing significant gains in computation time and
+memory usage over the general situation.
+
+See https://arxiv.org/abs/1908.02518 for details.
+.SH OPTIONS
+.TP
+\fB\-\-help\fR
+Display help.
+.TP
+\fB\-\-format\fR \fIformat\fR
+Specify input format. See \fB\-\-help\fR for a full list.
+.TP
+\fB\-\-dim \fIk\fR
+Compute persistent homology up to dimension \fIk\fR.
+.TP
+\fB\-\-threshold \fIt\fR
+Compute Rips complexes up to diameter \fIt\fR.
+.TP
+\fB\-\-ratio \fIr\fR
+Only show persistence pairs with death/birth ratio > \fIr\fR.
+.TP
+\fIfilename\fR
+Read input from this file. Uses stdin if not present.