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Definition of "Mexican-hat function" |
a function that resembles the profile of a Mexican hat. According to anatomy and physiology, the lateral interaction between cells in mammalian brains has a Mexican-hat form, that is, excitatory between nearby cells and inhibitory at longer range with strength falling off with distance. According to this phenomenon, Kohonen proposes a training algorithm for self-organizing system to update not only the weights of the winner but also the weights of its neighbors in competitive learning. |
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