Saturday, June 29, 2019

The Komar mass and the Einstein-Hilbert action for a sphere of incompressible fluid

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Let us have a static sphere of incompressible fluid. According to two sources on the Internet, the Ricci scalar is        R = 8π (ϱ - 3p...
Tuesday, June 25, 2019

The anti-gravity device material would allow faster-than-light travel

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The construction of an anti-gravity device requires material which can stand an enormous negative pressure and be so light that the positive...

The Einstein-Hilbert action may be broken - how has this been ignored for 103 years?

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UPDATE June 28, 2019: the lagrangian in the Einstein-Hilbert action may, after all, calculate the total energy correctly. The solution may b...
Tuesday, June 18, 2019

Does general relativity conserve momentum?

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https://en.wikipedia.org/wiki/ADM_formalism ADM have proved that in an asymptotically Minkowski spacetime, the ADM mass and momentum are c...
Monday, June 17, 2019

The error in the Frauchiger and Renner paper "Quantum theory cannot consistently describe the use of itself"

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UPDATE  June 17, 2019: We corrected the spelling in the headline of this page and made a new blog page. Note that the paper of Frauchiger...
Thursday, June 13, 2019

The Copenhagen interpretation and any wave function "collapse" is inconsistent with quantum mechanics

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UPDATE June 17, 2019: Our blog post on June 17, 2019 contains an example of what happens if an observer (F1 in this case) assumes that she c...
Friday, June 7, 2019

A rubber sheet model for the Schwarzschild solution

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UPDATE July 9, 2019: Note that the solution below is for a rubber sheet which has two spatial dimensions. A model for a 1+3D gravity should ...