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 [-4,-3].
EXAMPLE
Gamma(-3.6352933664369010978391815669460177139484238611935307...)
= 0.245127539834366250438230088857478287588513028833668283...
MATHEMATICA
digits = 104; x0 = x /. FindRoot[PolyGamma[x] == 0, {x, -7/2}, WorkingPrecision -> digits + 5]; RealDigits[x0, 10, digits] // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Apr 08 2015
STATUS
approved