I have been able to prove to myself that, based on Einstein's two postulates and the the Pythagorean theorem, that time dilates. From here how do I prove that length contracts? (All of this observing a frame that is moving relative to the proper frame at uniform velocity.)
You are correct, my original question should have asked about NO, not YES.
If the answer is NO then it seems that Einstein's second postulate was not so revolutionary.
I do have a related question.
How would Maxwell and other physicists at the time answer this question.
If an IFR were moving...