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Energy at each state in hopfield with symmetric weights network may increase or decrease?

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Energy at each state in hopfield with symmetric weights network may increase or decrease? (a) yes (b) no The question was posed to me during an online interview. Question is from Hopfield Model-2 in division Feedback Neural Networks of Neural Networks Please answer the above question.

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Correct answer is (b) no The explanation is: Energy of the network cant increase as it may then lead to instability.

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