An extension of Hopfield model of neural networks is proposed, considering sets of eccuivalent versions of a given memory. A logical validation switch is introduced, whose state is determined by the proximity of a probe vector to the respective equivalence classes. The algorithm is discussed in terms of cost and performances.
G. Y. Sirat,
A. D. Maruani,
"Frequency Multiplexed Implementation Of A Modified Hoofield Model", Proc. SPIE 0700, 1986 Intl Optical Computing Conf, (8 January 1987); doi: 10.1117/12.936990; https://doi.org/10.1117/12.936990