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On Hopfield Networks. From the overall mannequin to a particular… | by Arun Jagota | Oct, 2024


From the overall mannequin to a particular case

Picture by Shubham Dhage on Unsplash

The 2024 Nobel Prize in Physics went to John Hopfield and Geoffrey Hinton, John Hopfield on his work on the so-called Hopfield Community.

A number of a long time again, my PhD thesis was on Hopfield-style Networks. I figured this was a great time to put in writing this publish.

I’ll concentrate on Hopfield networks. I’ll start with the only instance and illustrate the way it works, then carry within the idea of an power operate and minimizing it regionally, then cowl the particular case launched in my PhD thesis, then come again to the extra normal case and talk about associative recollections and optimization use instances, then come again to the particular case to instantiate these functions in a extra particular setting.

Let’s start initially. First off, what’s a Hopfield Community?

Contemplate the image under.

Interpret it as follows. Now we have two neurons, every can tackle a price of 1 (assume “firing”) or -1 (assume “not firing”). The 2 neurons are linked by a optimistic weight, denoting a synapse of optimistic affect. That means that, from the angle of any one of many neurons, say the primary one, it needs the opposite one to be in the identical state as it’s — “firing” or “not firing”.

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