Re: New version of a relativity FAQ

Tom Roberts wrote on Mon, 23 Jun 2008 12:00:41 +0200:

harry wrote:

As I challenged before: write down the Lagrangian for classical
electrodynamics in terms of "relativistic mass" and all those 3-vectors.
Then do it for QED. THESE are the sort of problems with which
theoretical physicists are concerned; indeed, these are SIMPLE and
WELL-KNOWN problems, the real point is to use the known symmetries of
the world to find NEW theories. "Relativistic mass" completely abandons
the underlying symmetry, and is indeed useless for that; the 4-vectors
used by mainstream theoretical physicists make the Lorentz symmetry
completely transparent (i.e. one can tell at a glance if one's guessed
Lagrangian is Lorentz invariant or not).

Your argumentation may be pretty applied to your geometrical views on
gravitation.

"Now write the GR Lagrangian in terms of metric spacetime, R and all
those geometric stuff. Then do it for hypothetical QGR. THESE are the
sort of problems with which theoretical physicists are concerned [...]
geometric GR is indeed useless for that."

--
Center for CANONICAL |SCIENCE)
http://canonicalscience.org
.

Relevant Pages

  • Re: New version of a relativity FAQ
    ... electrodynamics in terms of "relativistic mass" and all those 3-vectors. ... the underlying symmetry, and is indeed useless for that; ... THESE are the sort of problems with which theoretical physicists are concerned geometric GR is indeed useless for that." ... The geometry of GR is, of course, inherently based on an underlying manifold. ...
    (sci.physics.relativity)
  • Re: New version of a relativity FAQ
    ... electrodynamics in terms of "relativistic mass" and all those 3-vectors.. ... the underlying symmetry, and is indeed useless for that; ... used by mainstream theoretical physicists make the Lorentz symmetry ... Lagrangian is Lorentz invariant or not). ...
    (sci.physics.relativity)