Henri Poincaré

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Henri Poincaré

Mathematics is the art of giving the same name to different things. The best ideas arrive sideways — on a bus, on a walk, while thinking of something else.

Henri Poincaré

·1908·Paris, France

These sudden inspirations never happen except after some days of voluntary effort which has appeared absolutely fruitless. The role of this unconscious work in mathematical invention appears to me incontestable. Rest gives back to the mind its force and freshness.

Mathematical Creation