12 Questions 95 Answers 0 Followers
Questions related from Bernard Lavenda
There has been much speculation that the Schwarzschild field harbors regions of gravitational repulsion, witnessed by a positive acceleration. The criterion is that the radial velocity should be...
15 June 2018 2,219 19 View
The Friedmann model of the universe forms the basis of the Standard Model. Yet, it is usually considered not as a pair of evolution equations, but, rather, a condition where the Hubble parameter...
29 June 2017 7,436 1 View
The Euler-Lagrange equation in general relativity contains an additional term to the acceleration involving the Christoffel connection coefficients. In the weak field limit, Newton's law of...
20 June 2017 9,455 49 View
It has no status, it doesn't exist. Unlike inertial motion where the velocity can be transformed away by a Lorentz transformation, rotational motion cannot. Einstein's principle would have...
09 May 2013 7,039 17 View
The thermal equation of state p=w e, where w is the ratio of the pressure, p, to the internal energy density, e, would identify it as the latter. If that were the case w would vary between 1/3 for...
30 April 2013 5,203 1 View
In every textbook on cosmology, with the exception of Robertson and Noonan, "Relativity and Cosmology" and "A New Perspective in Relativity", the square of the radial coordinate is taken to be...
23 April 2013 9,770 23 View
The conclusion is based upon a look-a-like appearance between the frequency spectrum of an exponential frequency shift due to acceleration. Although the frequency shift should be due to a uniform...
20 April 2013 5,251 27 View
The so-called Unruh temperature follows from an incorrect equivalence between the phase of the wave function as being given by the ratio of the classical action to Planck's constant and the...
24 March 2013 5,568 10 View
From its thermodynamic definition, a negative pressure would cause the volume to contract in order for the entropy to increase.
20 March 2013 4,511 15 View
Friedmann, "On the curvature of space" (1922) and "On the possibility of a world with constant negative curvature" (1924), chose a hyperbolic line element in which the spatial part was the...
01 January 1970 9,469 4 View
Based on the wave equation, some authors say that the distinction is based on invariance as opposed to conformal invariance Yet, if one looks at the line elements, (and I haven't seen that done...
01 January 1970 752 15 View
Einstein interpreted the vanishing of the eigenvalues of the Ricci tensor as the condition of "emptiness". In the most famous case where an analytic solution exists, Schwarzschild introduced a...
01 January 1970 5,181 20 View
