--- /dev/null
+.. _about_hypo_page:
+
+****************
+About Hypotheses
+****************
+
+**Hypotheses** represent boundary conditions which will be taken into account by meshing algorithms. The hypotheses allow you to manage the level of detail of the resulting mesh: when applying different hypotheses with different parameters you can preset the quantity or size of elements which will compose your mesh. So, it will be possible to generate a coarse or a more refined mesh.
+
+The choice of a hypothesis depends on the selected algorithm.
+
+Hypotheses are created during creation and edition of
+:ref:`meshes <constructing_meshes_page>` and :ref:`sub-meshes <constructing_submeshes_page>`.
+Once created a hypotheses can be reused during creation and edition of other meshes and sub-meshes. All created hypotheses and algorithms are present in the Object Browser in *Hypotheses* and *Algorithms* folders correspondingly. It is possible to open a dialog to modify the parameters of a hypothesis from its context menu. This menu also provides **Unassign** command that will unassign the hypothesis from all meshes and sub-meshes using it. Modification of any parameter of a hypothesis and its unassignment leads to automatic removal of elements generated using it.
+
+In **MESH** there are:
+
+* :ref:`a1d_meshing_hypo_page` for meshing of **edges**
+* :ref:`a2d_meshing_hypo_page` for meshing of **faces**
+* :ref:`a3d_meshing_hypo_page` for meshing of **volumes**
+* :ref:`additional_hypo_page`
+
+**Table of Contents**
+
+.. toctree::
+ :maxdepth: 2
+
+ 1d_meshing_hypo.rst
+ 2d_meshing_hypo.rst
+ 3d_meshing_hypo.rst
+ additional_hypo.rst
+
