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A005600 Decimal expansion of reciprocal of fine-structure constant alpha.
(Formerly M2606)

%I M2606

%S 1,3,7,0,3,5,9,9,9,1

%N Decimal expansion of reciprocal of fine-structure constant alpha.

%C The fine-structure "constant" actually isn't a constant, it depends on the energy at which it is measured: Its value is known to approach 1/128 at interaction energies above 80 GeV. For other considerations, e.g., whether the value of the fine-structure constant differs by location and over time, see the Wikipedia article or other links. - _M. F. Hasler_, Oct 30 2013

%D John Barrow, The Constants of Nature, 367 pp., Jonathan Cape, 2002.

%D K. R. Lang, Astrophysical Data: Planets and Stars, Springer-Verlag, NY, 1991.

%D Martin J. Rees, Just Six Numbers: the deep forces that shape the universe, Phoenix, 1999.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H E. R. Cohen and B. N. Taylor, <a href="http://dx.doi.org/10.1103/RevModPhys.59.1121">The 1986 adjustment of the fundamental physical constants</a>, Rev. Modern Phys., 59 (1987), 1121-1148.

%H NIST, <a href="http://physics.nist.gov/cgi-bin/cuu/Value?alphinv">inverse fine-structure constant</a>

%H Robert P. Munafo, <a href="http://www.mrob.com/pub/math/numbers-9.html"> Notable Properties of Specific Numbers</a>. [From _Robert G. Wilson v_, Sep 10 2008]

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Fine_structure_constant">Fine-structure constant</a>

%F 1/alpha = 1/A003673.

%F 1/alpha = c/V_n1 = A003678/A081800. - _Omar E. Pol_, Mar 11 2018

%e 137.035999...

%Y Cf. A003673, A082726.

%K cons,nonn

%O 3,2

%A _N. J. A. Sloane_, _Mira Bernstein_

%E Updated May 20 2003

%E Updated by _Omar E. Pol_, Aug 09 2009, by _Raphie Frank_, Dec 13 2012

%E Updated by _Arkadiusz Wesolowski_, Feb 08 2016

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Last modified March 21 04:59 EDT 2019. Contains 321364 sequences. (Running on oeis4.)