Documentation for v0.1 version (#199)

* Adding Equations, solving typos
* improve _code.rst
* the team rst and restuctore index.rst
* fixing errors

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Co-authored-by: Dario Coscia <dariocoscia@dhcp-015.eduroam.sissa.it>

pina/model/layers/utils_convolution.py

@@ -3,8 +3,8 @@ import torch
 
 def check_point(x, current_stride, dim):
     max_stride = current_stride + dim
-    indeces = torch.logical_and(x[..., :-1] < max_stride,
-                                x[..., :-1] >= current_stride).all(dim=-1)
+    indeces = torch.logical_and(x[..., :-1] < max_stride, x[..., :-1]
+                                >= current_stride).all(dim=-1)
     return indeces