[A]stronomers... define duration in the following way: time… - Henri Poincaré

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[A]stronomers... define duration in the following way: time... so defined that Newton's law and that of vis viva [or of the ] may be verified. Newton's law is an experimental truth... only approximate... [W]e still have only a definition by approximation.

Henri Poincaré

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About Henri Poincaré

Jules Henri Poincaré (29 April 1854 – 17 July 1912), generally known as Henri Poincaré, was one of France's greatest mathematicians and theoretical physicists, and a philosopher of science.

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Alternative Names: Jules Henri Poincare • Henri Poincare • Poincare • Jules Henri Poincaré • Poincaré

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Carl Friedrich Gauss Arthur Eddington Charles Sanders Peirce Werner Heisenberg David Hilbert

Additional quotes by Henri Poincaré

The geometric language is after all only a language. Space is only a word that we have believed a thing.

[W]e should say: 'Causes almost identical take almost the same time to produce almost the same effects.'

Mathematics is the art of giving the same name to different things.

[A]stronomers... define duration in the following way: time... so defined that Newton's law and that of vis viva [or of the ] may be verified. Newton… - Henri Poincaré

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