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-rw-r--r--stereographic.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/stereographic.hpp b/stereographic.hpp
index 61d81c5..638923f 100644
--- a/stereographic.hpp
+++ b/stereographic.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
#include <eigen3/Eigen/Cholesky>
#include "p-spin.hpp"