Relativity of simultaneity

(1996). “The twin "paradox" and the conventionality of simultaneity” (英語). American Journal of Physics 64 (4): 384–392. Bibcode: 1996AmJPh..64..384D

Review, March 1924. "The Dialectical Argument Against Absolute Simultaneity", The Journal of Philosophy, 1930. "Plans for the Future," Free World, November

they are not synchronized anymore from the viewpoint of S', establishing relativity of simultaneity in agreement with Einstein synchronization. Therefore

Prins, On Einstein's Non-Simultaneity, Length-Contraction and Time-Dilation ^ Kogut, John B. (2012). Introduction to Relativity: For Physicists and Astronomers