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## Main Question or Discussion Point

This is a quite simple question, and hopefully a simple answer. I know the basics of SR and GR, but I'm bothered by this one. It seems that by adding speeds you can get speeds greater than

Say we have 4 observers on 4 different bodies. Each observer believes his body to be a rest. We will say that all observers line up to form a straight line progressing from observer 1 -> 4.

Observer 1 views observer 2's body to be moving away at 1/2

*c*.Say we have 4 observers on 4 different bodies. Each observer believes his body to be a rest. We will say that all observers line up to form a straight line progressing from observer 1 -> 4.

Observer 1 views observer 2's body to be moving away at 1/2

*c*. Oberserver 2 views observer 3 to be moving away at 1/2*c*. And observer 3 sees observer 4 to be moving away at 1/2*c*. This would mean that observer 4 was moving away from observer 1 at 1 1/2*c*. How is the universal maximum*c*not broken here?