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+================================================================= =================================== ===================================
+:Author: Vincent Rouvreau :Introduced in: GUDHI 2.0.0 :Copyright: GPL v3
+:Requires: CGAL :math:`\geq` 4.7.0 Eigen3
+================================================================= =================================== ===================================
+
++----------------------------------------------------------------+------------------------------------------------------------------------+
+| .. figure:: | Alpha_complex is a simplicial complex constructed from the finite |
+| ../../doc/Alpha_complex/alpha_complex_representation.png | cells of a Delaunay Triangulation. |
+| :alt: Alpha complex representation | |
+| :figclass: align-center | The filtration value of each simplex is computed as the square of the |
+| | circumradius of the simplex if the circumsphere is empty (the simplex |
+| Alpha complex representation | is then said to be Gabriel), and as the minimum of the filtration |
+| | values of the codimension 1 cofaces that make it not Gabriel |
+| | otherwise. All simplices that have a filtration value strictly |
+| | greater than a given alpha squared value are not inserted into the |
+| | complex. |
+| | |
+| | This package requires having CGAL version 4.7 or higher (4.8.1 is |
+| | advised for better performance). |
++----------------------------------------------------------------+------------------------------------------------------------------------+
+| :doc:`alpha_complex_user` | :doc:`alpha_complex_ref` |
++----------------------------------------------------------------+------------------------------------------------------------------------+