Catalan's constant

Catalan's constant
RationalityUnknown
SymbolG
Representations
Decimal0.9159655941772190150...

In mathematics, Catalan's constant G, is the alternating sum of the reciprocals of the odd square numbers, being defined by:

where β is the Dirichlet beta function. Its numerical value[1] is approximately (sequence A006752 in the OEIS)

G = 0.915965594177219015054603514932384110774

Catalan's constant was named after Eugène Charles Catalan, who found quickly-converging series for its calculation and published a memoir on it in 1865.[2][3]

  1. ^ Papanikolaou, Thomas (March 1997). Catalan's Constant to 1,500,000 Places – via Gutenberg.org.
  2. ^ Goldstein, Catherine (2015). "The mathematical achievements of Eugène Catalan". Bulletin de la Société Royale des Sciences de Liège. 84: 74–92. MR 3498215.
  3. ^ Catalan, E. (1865). "Mémoire sur la transformation des séries et sur quelques intégrales définies". Ers, Publiés Par l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Collection in 4. Mémoires de l'Académie royale des sciences, des lettres et des beaux-arts de Belgique (in French). 33. Brussels. hdl:2268/193841.