, Question: How to organize the reverse execution of intermediate steps? What do we store, what do we recompute? Store all: memory expensive Recompute all: compute expensive Intermediate status?

:. Source and . Rao, A Deep Siamese Neural Network, p.2016

:. Source and . Surís, Cross-Modal Embeddings for Video and Audio Retrieval, 2018.

, Pitchfork graph 1 (aka join graphs

(. A. Theorem, . Beaumont, and S. Herrmann, , 2019.