I think that the brain almost certainly approximates gradient descent. And here is why: Any learning episode only appears to change the brain a tiny bit. 1/5
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Fascinating that one of the intrinsic gradient networks is... belief propagation. Rolfe’s earlier MS thesis has a dendritic + columnar model for sum-product BP. Once can do BP itself, gradient of BP is easy. Comes full circle with
@dileeplearning’s comments on the brain GD issue? -
Adam, do you have a link to his MS thesis?
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