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From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: sci.physics.relativity
Subject: Re: Incorrect mathematical integration
Date: 20 Jul 2024 11:10:40 GMT
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Mikko <mikko.levanto@iki.fi> wrote or quoted:
>On 2024-07-19 19:51:32 +0000, Richard Hachel said:
>>I once explained to a speaker that additions of relativistic speeds 
>>were not done in a common way, and that for example 0.5c+0.5c did not 
>>make c.
>That is a clear indication that you cannot explain.

  When nobody says otherwise, the symbols in "0.5c+0.5c" mean what
  they usually do (from math class back in school), so that sum is
  still c. Thing is, it doesn't give you the speed of a guy relative
  to Earth in a situation where he's cruising at 0.5c on one of
  those moving walkways that's also zipping along at 0.5c itself.