/*!

\page about_hypo_page About Hypotheses

\b 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 constructing_meshes_page "meshes" and
\ref constructing_submeshes_page "sub-mesh". 
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 \a Hypotheses and
\a Algorithms folders correspondingly. From the context menu of the
hypothesis you can invoke a dialog for modification of its parameters,
and \b Unassign command that will unassign the hypothesis from all
the meshes and sub-meshes using it.
Modification of any hypothesis parameter and unassignment of a
hypothesis leads to automatic removal of elements generated with use
of this hypothesis.

In \b MESH there are the following Basic Hypotheses:
<ul>
<li>\subpage a1d_meshing_hypo_page "1D Hypotheses" (for meshing of 
<b>edges</b>):</li>
<ul>
<li>\ref number_of_segments_anchor "Number of segments"</li>
<li>\ref average_length_anchor "Local Length"</li>
<li>\ref max_length_anchor "Max Size"</li>
<li>\ref adaptive_1d_anchor "Adaptive"</li>
<li>\ref arithmetic_1d_anchor "Arithmetic 1D"</li>
<li>\ref geometric_1d_anchor "Geometric Progression"</li>
<li>\ref start_and_end_length_anchor "Start and end length"</li>
<li>\ref deflection_1d_anchor "Deflection 1D"</li>
<li>\ref automatic_length_anchor "Automatic Length"</li>
<li>\ref fixed_points_1d_anchor "Fixed points 1D"</li>
</ul>
<li>\subpage a2d_meshing_hypo_page "2D Hypotheses" (for meshing of <b>faces</b>):</li>
<ul>
<li>\ref max_element_area_anchor "Max Element Area"</li>
<li>\ref length_from_edges_anchor "Length from Edges"</li>
<li>\ref hypo_quad_params_anchor "Quadrangle Parameters"</li>
</ul>
<li>3D Hypothesis (for meshing of <b>volumes</b>):</li>
<ul>
<li>\subpage max_element_volume_hypo_page "Max Element Volume"</li>
</ul>
</ul>

There also exist
\subpage additional_hypo_page "Additional Hypotheses":
<ul>
<li>\ref propagation_anchor "Propagation of 1D Hypothesis on opposite edges"</li>
<li>\ref propagofdistribution_anchor "Propagation of Node Distribution on Opposite Edges"</li>
<li>\ref viscous_layers_anchor "Viscous layers"</li>
<li>\ref quadratic_mesh_anchor "Quadratic mesh"</li>
<li>\ref quadrangle_preference_anchor "Quadrangle preference"</li>
</ul>

*/