OFFSET
0,1
COMMENTS
This is the maximum increase in mass-energy a particle can carry away from a neutral rotating (Kerr) black hole via the Penrose process.
REFERENCES
Subrahmanyan Chandrasekhar, The Mathematical Theory of Black Holes, Oxford (1983), pp. 368-369.
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
Stijn J. van Tongeren, Rotating black holes (2009).
Wikipedia, Penrose process
EXAMPLE
0.20710678118654752440084436210484903928483593768847403658833986899536623...
MATHEMATICA
RealDigits[(Sqrt[2] - 1) / 2, 10, 90] [[1]] (* Vincenzo Librandi, Feb 20 2016 *)
PROG
(PARI) (sqrt(2)-1)/2
(Magma) (Sqrt(2)-1)/2 // Vincenzo Librandi, Feb 20 2016
CROSSREFS
KEYWORD
AUTHOR
Charles R Greathouse IV, Feb 19 2016
EXTENSIONS
More digits from Jon E. Schoenfield, Mar 15 2018
STATUS
approved