```
Figure 1 shows the computational graph with the backward() and grad() arguments highlighted in red and blue, respectively:




Fgiure 1: Correspondence of `backward`/`grad` arguments in the graphs.

Going Inside the Autograd Engine
Refreshing Concepts: Nodes and Edges
As we saw in 2
The computational graph comprises Node and Edge objects. Please read that post if you haven’t done it yet.
Nodes