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Evaluation of the additive constants in the space-time Lorentz transformationequations required, according to Einstein, to correctly describe synchronisedclocks at different spatial locations, reveals the spurious and unphysicalnature of the 'relativity of simultaneity' and 'length contraction' effects ofconventional special relativity. Unlike time dilation, there is no experimentalevidence for these putative effects. Only a universal (position independent)time dilation effect for different inertial frames distinguishes special fromGalilean relativity.

Consequences for special relativity theory of restoring Einstein's neglected additive constants in the Lorentz Transformation