# What is the purpose and usage of convolution?

I am curious of what the purpose and usage of convolution are. Why is convolution created? In layman's term (and in mathematical term), what defines convolution?

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Have you checked ou the wikipedia article? en.wikipedia.org/wiki/Convolution –  Jeremy Dec 14 '12 at 8:59
–  flavio Dec 14 '12 at 9:32