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I have heard that only a single layer is needed for an artificial neural network to fit any possible function (input to output).

1. Is this true and where is this shown?

2. If this is true, then what is the advantage of having multiple layers?

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Search for the subject: How many hidden layers should I use?

http://www.faqs.org/faqs/ai-faq/neural-nets/part3/

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    amazing link!!! Thank you. How come I never heard of this site?? I love it, because it is theoretical and practical.2011-06-25