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-rw-r--r--src/Persistent_cohomology/example/rips_persistence.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Persistent_cohomology/example/rips_persistence.cpp b/src/Persistent_cohomology/example/rips_persistence.cpp
index d7927223..f7f9527f 100644
--- a/src/Persistent_cohomology/example/rips_persistence.cpp
+++ b/src/Persistent_cohomology/example/rips_persistence.cpp
@@ -29,6 +29,7 @@
#include <boost/program_options.hpp>
using namespace Gudhi;
+using namespace Gudhi::persistent_cohomology;
typedef int Vertex_handle;
typedef double Filtration_value;