OFFSET
1,1
LINKS
Eric Weisstein's MathWorld, Gamma Function
Wikipedia, Particular values of the Gamma Function
FORMULA
Solution to PolyGamma(x) = 0 in the interval [-6,-5]
EXAMPLE
Gamma(-5.66716244155688553584947417451815542471179578769484889367...)
= 0.00932459448261485052171192379918266310927330588790814482...
MATHEMATICA
digits = 104; x0 = x /. FindRoot[PolyGamma[0, x] == 0, {x, -11/2}, WorkingPrecision -> digits + 5]; RealDigits[x0, 10, digits] // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Apr 08 2015
STATUS
approved