Einstein, in his paper "On the Electrodynamics of Moving Bodies", part 1, sec. 3, writes: "(adsbygoogle = window.adsbygoogle || []).push({}); Primarily it is clear that on account of the property of homogeneity which we ascribe to time and space, the equations must be" What has the homogeneity of space and time to do with the degree of the equations?linear.

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# Linear equations and homogeneity of space and time

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