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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20141117T123000
DTEND;TZID=Atlantic/Canary:20141117T133000
UID:iactalks-703
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /Talks/view/703
CREATED:2014-11-17T12:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY: Is General Relativity a restricted theory?
DESCRIPTION: Is General Relativity a restricted theory? \nProf. MartÃn Riv
as\n\nThings should be made simple, but not simpler. What we want to show
is that General Relativity, as it stands today, can be considered as a g
ravitational theory of low velocity spinless matter, and therefore a rest
ricted theory of gravitation. Gravity is understood as a geometrization o
f spacetime. But spacetime is also the manifold of the boundary values of
the spinless point particle in a variational approach. Since all known e
lementary matter, baryons, leptons and gauge bosons are spinning objects,
it means that the manifold, which we call the kinematical space, where w
e play the game of the variational formalism of a classical elementary pa
rticle must be greater than spacetime. Mathematics shows that this manif
old for any arbitrary mechanical system is always a Finsler metric space,
such that the variational formalism can be interpreted as a geodesic pro
blem on this metric space. This manifold is just the flat Minkowski space
for the free spinless particle. Any interaction modifies its flat
Finsler metric as gravitation does. The same thing happens for the spinn
ing objects, but now the Finsler metric space has more dimensions and its
metric is modified by any interaction, so that to reduce gravity to the
modification only of the metric of the spacetime submanifold is to make a
simpler theory, the gravitational theory of spinless matter. Even the u
sual assumption that the modification of the metric only produces a Riema
nnian metric of the spacetime is also a restriction because in general th
e coefficients for a Finsler metric, are also dependent on the velocities
. Removal of the velocity dependence of metric coefficients is equivalent
to consider the restriction to low velocity matter. In the spirit of un
ification of all forces, gravity cannot produce, in principle, a differen
t and simpler geometrization than any other interaction. References: arX
iv: 1203.4076
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