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-rw-r--r--src/python/gudhi/simplex_tree.pyx3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/python/gudhi/simplex_tree.pyx b/src/python/gudhi/simplex_tree.pyx
index cdd2e87b..665d41e6 100644
--- a/src/python/gudhi/simplex_tree.pyx
+++ b/src/python/gudhi/simplex_tree.pyx
@@ -627,6 +627,9 @@ cdef class SimplexTree:
:param nb_iterations: The number of edge collapse iterations to perform. Default is 1.
:type nb_iterations: int
+
+ :note: collapse_edges method requires `Eigen <installation.html#eigen>`_ >= 3.1.0 and an exception is thrown
+ if this method is not available.
"""
# Backup old pointer
cdef Simplex_tree_interface_full_featured* ptr = self.get_ptr()