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-rw-r--r--src/Persistent_cohomology/example/rips_persistence.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Persistent_cohomology/example/rips_persistence.cpp b/src/Persistent_cohomology/example/rips_persistence.cpp
index e6645806..4253def9 100644
--- a/src/Persistent_cohomology/example/rips_persistence.cpp
+++ b/src/Persistent_cohomology/example/rips_persistence.cpp
@@ -117,7 +117,7 @@ void program_options( int argc, char * argv[]
("field-charac,p", po::value<int>(&p)->default_value(11),
"Characteristic p of the coefficient field Z/pZ for computing homology.")
("min-persistence,m", po::value<Filtration_value>(&min_persistence),
- "Minimal lifetime of homology feature to be recorded. Default is 0");
+ "Minimal lifetime of homology feature to be recorded. Default is 0. Enter a negative value to see zero length intervals");
po::positional_options_description pos;
pos.add("input-file", 1);