Intuition behind reverse mode algorithmic differentiation (AD)

By far not a complete story on AD, but provides a mental image to help digest further material on AD.

For a bit more context, how AD can be used to compose full Jacobians, see    • High-level view of AD (algorithmic differe...  

Created with the help of LIMEL (www.kuleuven.be/onderwijs/onderwijsbeleid/limel), sponsered by MECO ( www.mech.kuleuven.be/en/pma/research/meco )