Feedback about Parametrizations Tutorial

[pentanol2]

There is the following issue on this page: https://docs.pytorch.org/tutorials/intermediate/parametrizations.html

Parametrization is not a topic known to all. You could add some context about the definition of parametrization to the tutorial, why the need for it was born ? What does it solve ? The go into giving the examples. Adding references for further reading could be very helpful. Especially for beginners.