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1918 in science
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==Physics== * July 26 – [[Emmy Noether]] introduces what becomes known as [[Noether's theorem]], from which [[conservation law]]s are deduced for symmetries of [[angular momentum]], linear [[momentum]] and [[energy]], at [[Göttingen]], Germany. * [[Josef Lense]] and [[Hans Thirring]] find the gravitomagnetic precession of [[gyroscope]]s in the equations of [[general relativity]]. * [[Hans Reissner]] and [[Gunnar Nordström]] solve the [[Einstein's field equation|Einstein]] and [[Maxwell's equation|Maxwell field equations]] for charged spherically symmetric non-rotating systems. * [[Friedrich Kottler]] gets a Schwarzschild solution without Einstein vacuum field equations.
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