OFFSET
1,2
COMMENTS
Also the location of the zero of the digamma function in the same interval.
LINKS
Eric Weisstein's World of Mathematics, Gamma Function.
Wikipedia, Particular values of the Gamma function
EXAMPLE
Gamma(-1.5734984731623904587782860437..) = 2.3024072583396801358235820396..
MATHEMATICA
x /. FindRoot[ PolyGamma[0, x] == 0, {x, -3/2}, WorkingPrecision -> 110] // Abs // RealDigits // First // Take[#, 105]& (* Jean-François Alcover, Jan 21 2013 *)
PROG
(PARI) solve(x=1.5, 1.6, psi(-x)) \\ Charles R Greathouse IV, Jul 19 2013
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, May 25 2010
STATUS
approved