Documentation: Non persistent links

During the link check we found some references to `#title..` in respect to links to CGAL, these links work at the moment but are, by CGAL, generated links during runtime based on the HTML `<H...>` tags.
When a new paragraph or chapter is added these numbers will change and thus will the link point to the wrong place. All these items have also a more persistent reference anchor that is generated based on the `<name>` of the section (e.g. `\section <name> <description>`).
Therefore it is better to used the references based on the `<name>`.

4 files changed, 8 insertions, 8 deletions

diff --git a/src/Alpha_complex/doc/Intro_alpha_complex.h b/src/Alpha_complex/doc/Intro_alpha_complex.h
index 5ab23720..ca48ebd2 100644
--- a/src/Alpha_complex/doc/Intro_alpha_complex.h
+++ b/src/Alpha_complex/doc/Intro_alpha_complex.h
@@ -164,11 +164,11 @@ Table of Contents
  * <b>Requires:</b> \ref eigen &ge; 3.1.0 and \ref cgal &ge; 5.1.0.
  * 
  * A weighted version for Alpha complex is available (cf. Alpha_complex). It is like a usual Alpha complex, but based
- * on a <a href="https://doc.cgal.org/latest/Triangulation/index.html#title20">CGAL regular triangulation</a> instead
+ * on a <a href="https://doc.cgal.org/latest/Triangulation/index.html#TriangulationSecRT">CGAL regular triangulation</a> instead
  * of Delaunay.
  *
  * This example builds the CGAL weighted alpha shapes from a small molecule, and initializes the alpha complex with
- * it. This example is taken from <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title13">CGAL 3d
+ * it. This example is taken from <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#AlphaShape_3DBuildingBasicAlphaShapesForManyPoints">CGAL 3d
  * weighted alpha shapes</a>.
  *
  * Then, it is asked to display information about the alpha complex.
@@ -212,7 +212,7 @@ Table of Contents
  * Gudhi::alpha_complex::complexity::EXACT.
  *
  * This example builds the CGAL 3d weighted alpha shapes from a small molecule, and initializes the alpha complex with
- * it. This example is taken from <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title13">CGAL 3d
+ * it. This example is taken from <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#AlphaShape_3DBuildingBasicAlphaShapesForManyPoints">CGAL 3d
  * weighted alpha shapes</a>.
  *
  * Then, it is asked to display information about the alpha complex.
diff --git a/src/Alpha_complex/include/gudhi/Alpha_complex_3d.h b/src/Alpha_complex/include/gudhi/Alpha_complex_3d.h
index b3dbc9bb..562ef139 100644
--- a/src/Alpha_complex/include/gudhi/Alpha_complex_3d.h
+++ b/src/Alpha_complex/include/gudhi/Alpha_complex_3d.h
@@ -98,7 +98,7 @@ struct Value_from_iterator<complexity::EXACT> {
  * \tparam Periodic Boolean used to set/unset the periodic version of Alpha_complex_3d. Default value is false.
  *
  * For the weighted version, weights values are explained on CGAL
- * <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title0">Alpha shapes 3d</a> and
+ * <a href="https://doc.cgal.org/latest/Alpha_shapes_3/index.html#Alpha_shapes_3Definitions">Alpha shapes 3d</a> and
  * <a href="https://doc.cgal.org/latest/Triangulation_3/index.html#Triangulation3secclassRegulartriangulation">Regular
  * triangulation</a> documentation.
  *
diff --git a/src/Alpha_complex/utilities/alphacomplex.md b/src/Alpha_complex/utilities/alphacomplex.md
index 0d3c6027..1e3b8fab 100644
--- a/src/Alpha_complex/utilities/alphacomplex.md
+++ b/src/Alpha_complex/utilities/alphacomplex.md
@@ -64,7 +64,7 @@ N.B.:
 * Weights values are explained on CGAL

 [dD Triangulations](https://doc.cgal.org/latest/Triangulation/index.html)

 and

-[Regular triangulation](https://doc.cgal.org/latest/Triangulation/index.html#title20) documentation.

+[Regular triangulation](https://doc.cgal.org/latest/Triangulation/index.html#TriangulationSecRT) documentation.

 

 

 ## alpha_complex_3d_persistence ##

@@ -131,6 +131,6 @@ N.B.:
 * `alpha_complex_3d_persistence` only accepts OFF files in dimension 3.

 * Filtration values are alpha square values.

 * Weights values are explained on CGAL

-[Alpha shape](https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title0)

+[Alpha shape](https://doc.cgal.org/latest/Alpha_shapes_3/index.html#Alpha_shapes_3Definitions)

 and

 [Regular triangulation](https://doc.cgal.org/latest/Triangulation_3/index.html#Triangulation3secclassRegulartriangulation) documentation.

diff --git a/src/python/doc/alpha_complex_user.rst b/src/python/doc/alpha_complex_user.rst
index b060c86e..4082cd9d 100644
--- a/src/python/doc/alpha_complex_user.rst
+++ b/src/python/doc/alpha_complex_user.rst
@@ -178,11 +178,11 @@ Weighted version
 ^^^^^^^^^^^^^^^^
 
 A weighted version for Alpha complex is available. It is like a usual Alpha complex, but based on a
-`CGAL regular triangulation <https://doc.cgal.org/latest/Triangulation/index.html#title20>`_.
+`CGAL regular triangulation <https://doc.cgal.org/latest/Triangulation/index.html#TriangulationSecRT>`_.
 
 This example builds the weighted alpha-complex of a small molecule, where atoms have different sizes.
 It is taken from
-`CGAL 3d weighted alpha shapes <https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title13>`_.
+`CGAL 3d weighted alpha shapes <https://doc.cgal.org/latest/Alpha_shapes_3/index.html#AlphaShape_3DBuildingBasicAlphaShapesForManyPoints>`_.
 
 Then, it is asked to display information about the alpha complex.