## On Corda's 'Clarification' of Schwarzschild's Solution

**Authors:** Stephen J. Crothers

A paper by C. Corda (A Clarification on the Debate on ''the Original Schwarzschild Solution'', EJTP 8, No. 25 (2011) 65-82) purports equivalence of Schwarzschild's original solution (1916) and Hilbert's subsequent solution (1917), the latter commonly but incorrectly called 'Schwarzschild's solution’. The derivation of Schwarzschild's actual solution by Corda is, in fact, a copy of Schwarzschild's original derivation with only changes in notation and equation numbering. It adds nothing new to the problem. Corda's subsequent arguments on gravitational collapse follow those advanced by Misner, Thorne, and Wheeler for Hilbert's solution, in their book 'Gravitation', and suffer thereby from the very same shortfalls. Consequently, Corda has failed to prove his alleged equivalence of the Schwarzschild and Hilbert solutions. Moreover, it is not difficult to prove that these are not equivalent. Furthermore, all methods employed to otherwise 'extend' Droste's solution into Hilbert’s solution thus producing a black hole constitute a violation of the rules of pure mathematics and are invalid.

**Comments:** 22 Pages. This paper was submitted to the Electronic Journal of Theoretical Physics on 18 February 2016; the journal that published Corda's paper. Accepted for publication: Hadronic Journal Vol. 39, 2016.

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### Submission history

[v1] 2016-02-18 04:55:30

[v2] 2016-02-26 00:20:51

[v3] 2016-03-23 06:19:06

[v4] 2016-03-31 05:46:47

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