fix docs

docs/source/_rst/code.rst

@@ -18,6 +18,7 @@ Model
 .. toctree::
     :maxdepth: 3
 
+    Network <network.rst>
     FeedForward <fnn.rst>
     DeepONet <deeponet.rst>
     MultiFeedForward <multifeedforward.rst>

docs/source/_rst/network.rst

@@ -0,0 +1,10 @@
+Network
+================
+.. currentmodule:: pina.model.network
+
+.. automodule:: pina.model.network
+
+.. autoclass:: Network
+    :members:
+    :private-members:
+    :show-inheritance:

pina/problem/parametric_problem.py

@@ -23,7 +23,7 @@ class ParametricProblem(AbstractProblem):
         >>>
         >>>     output_variables = ['u']
         >>>     spatial_domain = Span({'x': [0, 1]})
-        >>>     parameter_domain = Span({'alpha': {1, 10}})
+        >>>     parameter_domain = Span({'alpha': [1, 10]})
         >>>
         >>>     def ode_equation(input_, output_):
         >>>         u_x = grad(output_, input_, components=['u'], d=['x'])
@@ -43,8 +43,14 @@ class ParametricProblem(AbstractProblem):
 
     @abstractmethod
     def parameter_domain(self):
+        """
+        The parameters' domain of the problem.
+        """
         pass
 
     @property
     def parameters(self):
+        """
+        The parameters' variables of the problem.
+        """
         return self.parameter_domain.variables