The Hopfield Network: Answers

Copyright © Simon Dennis, 1997.

Exercise 1: Typically, the energy will be -202. However, because activations are updated randomly it is possible for the network to have a higher energy after 100 cycles.

Exercise 2:

PatternEnergy
One-178
Two-202
Three-202
Four-166

Exercise 3: The energy is -202 exactly the same as for the non-reversed pattern.

Exercise 4:

PatternStarting EnergyFinal Energy
Cut Off One-42-178
Cut Off Four-38-166
Noisy One-58-178
Noisy Two-42-202
Noisy Three-58-202
Noisy Four-38-166

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