PDE it is, says I, regardless of the high philosophin' here:
What we call a straight line in astronomy is simply the path of a ray of light. If, therefore, we were to discover negative parallaxes, or to prove that all parallaxes are higher than a certain limit, we should have a choice between two conclusions: we could give up Euclidean geometry, or modify the laws of optics, and suppose that light is not rigorously propagated in a straight line. It is needless to add that every one would look upon this solution as the more advantageous. - Nancy Poincaré
6 comments:
Define "parallel" without a differential equation, Tecs!
Look up Euclid's book.
"Now Saudi men are planning to put a stop to the fight for women's rights by beating female drivers until they give up."
That's a downright Rotten argument.
Does it work or is it like some \cd?
PDE it is, says I, regardless of the high philosophin' here:
What we call a straight line in astronomy is simply the path of a ray of light. If, therefore, we were to discover negative parallaxes, or to prove that all parallaxes are higher than a certain limit, we should have a choice between two conclusions: we could give up Euclidean geometry, or modify the laws of optics, and suppose that light is not rigorously propagated in a straight line. It is needless to add that every one would look upon this solution as the more advantageous. - Nancy Poincaré
What does this have to do with beating up on parallel-parkers?
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