On the variation of G and scale invariant gravitation - A reply

Details On the variation of G and scale invariant gravitation - A reply On the variation of G and scale invariant gravitation - A reply

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.197.1093c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 197, Dec. 1981, p. 1093-1095.

Astronomy and Astrophysics

Astrophysics

1

Astrophysics, Atomic Clocks, Gravitation Theory, Integral Equations, Invariance

Scientific paper

In 1977 Canuto et al. proposed a formalism to deal with the possible difference between gravitational and atomic clocks (or times). The formalism was incomplete since the authors only dealt with the gravitational Lagrangian LG, leaving the specific form of the matter Lagrangian Lm for a later study. Kembhavi and Pollock (1981) have proposed a matter Lagrangian which they define as 'the only possible one' or 'the inescapable form of Lm'. Adding this Lm to Lg, they claim that the theory does not allow for a variable G. The present paper gives a mathematical proof that the proposed matter Lagrangian, far from being 'the only one' or 'the inescapable form', is actually a very special case which already contains imprinted all the conclusions Kembhavi and Pollock claim to have discovered. Their results are therefore erroneous.

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