update doc

docs/source/index.rst

@@ -9,32 +9,32 @@ Welcome to PINA’s documentation!
   .. grid-item::
 
       .. image:: index_files/tutorial_13_3.png
-        :target: tutorials/tutorial2/tutorial.html
+        :target: tutorial2/tutorial.html
 
   .. grid-item::
 
       .. image:: index_files/tutorial_32_0.png
-        :target: tutorials/tutorial4/tutorial.html
+        :target: tutorial4/tutorial.html
 
   .. grid-item::
 
       .. image:: index_files/tutorial_13_01.png
-        :target: tutorials/tutorial9/tutorial.html
+        :target: tutorial9/tutorial.html
 
   .. grid-item::
 
       .. image:: index_files/tutorial_36_0.png
-        :target: tutorials/tutorial6/tutorial.html
+        :target: tutorial6/tutorial.html
 
   .. grid-item::
 
       .. image:: index_files/tutorial_15_0.png
-        :target: tutorials/tutorial13/tutorial.html
+        :target: tutorial13/tutorial.html
 
   .. grid-item::
 
       .. image:: index_files/tutorial_5_0.png
-        :target: tutorials/tutorial10/tutorial.html
+        :target: tutorial10/tutorial.html
 
 .. grid:: 1 1 3 3
 
@@ -45,7 +45,7 @@ Welcome to PINA’s documentation!
     an open-source Python library providing an intuitive interface for
     solving differential equations using PINNs, NOs or both together.
 
-    Based on `PyTorch <https://pytorch.org/>`_ and `PyTorchLightning <https://lightning.ai/docs/pytorch/stable/>`_, **PINA** offers a simple and intuitive way to formalize a specific (differential) problem
+    Based on `PyTorch <https://pytorch.org/>`_, `PyTorchLightning <https://lightning.ai/docs/pytorch/stable/>`_, and `PyG <https://pytorch-geometric.readthedocs.io/en/latest/>`_, **PINA** offers a simple and intuitive way to formalize a specific (differential) problem
     and solve it using neural networks . The approximated solution of a differential equation
     can be implemented using PINA in a few lines of code thanks to the intuitive and user-friendly  interface.        
 
@@ -63,9 +63,9 @@ Welcome to PINA’s documentation!
     .. toctree::
       :maxdepth: 1
 
-      Installing <_installation>
-      Tutorial <_tutorial>
       API <_rst/_code>
+      Tutorial <_tutorial>
+      Installing <_installation>
       Team & Foundings <_team.rst>
       Contributing <_contributing>
       License <_LICENSE.rst>