Talk:BKL singularity

Stub to start

I made a general plan of this article according to the original BKL paper. Comments and suggestions welcome. --Lantonov (talk) 15:29, 25 February 2008 (UTC)

In the last month, I expanded this article and it is no more a mere stub. Maybe start class is more appropriate. I plan to finish adding new material in the next month or so. Because it is a very high level math, with no support for a general reader, in a severe reader-unfriendly style, the next stage will be to make it somewhat easier read, and hopefully, shorten it in the process by relegating some of the stern math in supporting articles, probably in Wiki-books where the material will be presented in more pedagogic (as opposed to encyclopedic) style. It will be possible because there we won't be limited to size, as it is here. I have a large quantity of background material, including computer calculations (Mathematica and Maple) of the hardest formulae. I am still waiting for help from the 2 projects above. --Lantonov (talk) 12:59, 13 June 2008 (UTC)

Text completion

The bulk of the text for this article is now in place. It is rather long: 115 kb. The aim is to shorten it twofold: 50-60 kb. The following stages are:

1. Copy most of the text to Wikibooks by transwiki'ing
2. Move in 2 opposite directions:
   1. Compress text in Wikipedia to 50-60 kb by taking out most of the math and replacing it with words. Also make text accessible to general reader by easing on terminology and adding up to 4-5 pictures.
   2. Expand text in Wikibooks by including intermediate calculations, proofs, and program code for the most intensive computations. --Lantonov (talk) 14:25, 28 January 2009 (UTC)

Lantonov (talk) 07:08, 7 June 2018 (UTC)

Garfinkle

I think that Garfinkle's paper

Garfinkle, D. (2004). "Numerical Simulations of Generic Singularities". Phys. Rev. Lett. 93 (16): 161101. doi:10.1103/PhysRevLett.93.161101.

needs to be cited and properly inserted into the article. It gives a numerical proof of correctness of BKL scenario.--Pra1998 (talk) 12:42, 27 May 2010 (UTC)

Garfinkle's paper is a good confirmation of BKL. Recently (2018), there was another numerical confirmation of BKL by Beverly Berger et al. These confirmations are needed because of the criticism to BKL, for example that by Barrow and Tipler. These discussions should be also included but also other more important material such as the extension of BKL to other Bianchi types (such as Type I and Type II spaces) and finally to finite masses (black holes). An accessible introductory section is needed describing in simple language the chaotic nature of the stretching and squashing in different directions in BKL and how it differs from the regularity of the Oppenheimer-Snyder and Reissner-Nordstrom types of solutions, the stability of the solution against perturbations, the probabilistic nature of the spacetime foam inside the BKL singularity, aging of the singularity, etc. I may return to this topic after 9 years of other pursuits and try to organise the vast material collected during this time into some sensible whole. Lantonov (talk) 21:29, 1 June 2018 (UTC)

Garfinkle also did a very simple and well illustrated (even animated) explanation of BKL singularity in David Garfinkle (2007). "Of singularities and breadmaking". Einstein Online. 03. Some of it can enter in the non-technical introduction. Lantonov (talk) 07:08, 7 June 2018 (UTC)

Error in figure 1

There is an error in Figure 1 which I need to correct. Can you spot it? Lantonov (talk) 09:28, 25 June 2018 (UTC)

Hmm, it refuses to be replaced with the correct figure. Maybe I'll need some help on this. Lantonov (talk) 06:36, 26 June 2018 (UTC)

The error is removed now. Lantonov (talk) 08:11, 13 August 2018 (UTC)