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Zbigniew Oziewicz
Relativity Groupoid Instead of Relativity Group

Date: 2009-12-26 Time: 07:00 - 09:00 US/Pacific (1 decade 3 years ago)
America/Los Angeles: 2009-12-26 07:00 (DST)
America/New York: 2009-12-26 10:00 (DST)
America/Sao Paulo: 2009-12-26 11:00
Europe/London: 2009-12-26 14:00
Asia/Colombo: 2009-12-26 19:30
Australia/Sydney: 2009-12-27 01:00 (DST)

Where: Online Video Conference
Recording Playback
This video conference used DimDim, now a private company.
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  1. The Lorentz relativity group if and only if there is a preferred reference system Ether.
  2. No preferred reference system (relativity principle) imply no relativity group, instead must be relativity groupoid.