ᐅ An idea which can be used only once is a trick. If one can use it more than once it becomes a method. – George Polya | QuotesTrue.com

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An idea which can be used only once is a trick. If one can use it more than once it becomes a method.

George Polya

"Problems and Theorems in Analysis I: Series. Integral Calculus. Theory of Functions".

973

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