“…The use of two-dimensional solutions in certain three-dimensional problems has been suggested, and was studied experimentally by Martin [24] , but is not valid for any three-dimensional problems. The proper extension to three dimensions in spherical or cylindrical coordinates is far from trivial.…”
“…The use of two-dimensional solutions in certain three-dimensional problems has been suggested, and was studied experimentally by Martin [24] , but is not valid for any three-dimensional problems. The proper extension to three dimensions in spherical or cylindrical coordinates is far from trivial.…”
TIME AND FREQUENCYOn Friday, October 13, 1967, the General Conference of Weights and Measures adopted the atomic definition of the unit of time, the second.
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