partially fix documentation (#80)

docs/source/_rst/abstractproblem.rst

@@ -0,0 +1,12 @@
+AbstractProblem
+===========
+.. currentmodule:: pina.problem.abstract_problem
+
+.. automodule:: pina.problem.abstract_problem
+
+.. autoclass:: AbstractProblem
+    :members:
+    :private-members:
+    :undoc-members:
+    :show-inheritance:
+    :noindex:

docs/source/_rst/code.rst

@@ -10,5 +10,9 @@ Code Documentation
     FeedForward <fnn.rst>
     DeepONet <deeponet.rst>
     ContinuousConv <convolution.rst>
+    MultiFeedForward <multifeedforward.rst>
+    AbstractProblem <abstractproblem.rst>
+    SpatialProblem <spatialproblem.rst>
+    TimeDependentProblem <timedepproblem.rst>
     Operators <operators.rst>
-    Plotter <plotter.rst>
+    Plotter <plotter.rst>

docs/source/_rst/multifeedforward.rst

@@ -0,0 +1,12 @@
+MultiFeedForward
+===========
+.. currentmodule:: pina.model.multi_feed_forward
+
+.. automodule:: pina.model.multi_feed_forward
+
+.. autoclass:: MultiFeedForward
+    :members:
+    :private-members:
+    :undoc-members:
+    :show-inheritance:
+    :noindex:

docs/source/_rst/parametricproblem.rst

@@ -0,0 +1,12 @@
+ParametricProblem
+===========
+.. currentmodule:: pina.problem.parametric_problem
+
+.. automodule:: pina.problem.parametric_problem
+
+.. autoclass:: ParametricProblem
+    :members:
+    :private-members:
+    :undoc-members:
+    :show-inheritance:
+    :noindex:

docs/source/_rst/spatialproblem.rst

@@ -0,0 +1,12 @@
+SpatialProblem
+===========
+.. currentmodule:: pina.problem.spatial_problem
+
+.. automodule:: pina.problem.spatial_problem
+
+.. autoclass:: SpatialProblem
+    :members:
+    :private-members:
+    :undoc-members:
+    :show-inheritance:
+    :noindex:

docs/source/_rst/timedepproblem.rst

@@ -0,0 +1,12 @@
+TimeDependentProblem
+===========
+.. currentmodule:: pina.problem.timedep_problem
+
+.. automodule:: pina.problem.timedep_problem
+
+.. autoclass:: TimeDependentProblem
+    :members:
+    :private-members:
+    :undoc-members:
+    :show-inheritance:
+    :noindex: