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Why do sigmoid functions work in Neural Nets?

  1. Jul 26, 2012 #1
    Hi,

    I have just started programming for Neural networks. I am currently working on understanding how a Backpropogation (BP) neural net works. While the algorithm for training in BP nets is quite straightforward, I was unable to find any text on why the algorithm works. More specifically, I am looking for some mathematical reasoning to justify using sigmoid functions in neural nets, and what makes them mimic almost any data distribution thrown at them.

    Thanks!
     
  2. jcsd
  3. Jul 27, 2012 #2
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