The Buchstab function 
is defined by the delay differential equation
 |
(1)
|
(Panario 1998). It approaches the asymptotic value 
as 
(and in fact has nearly reached this value already
by 
).
Buchstab Function
See also
Dickman FunctionExplore with Wolfram|Alpha
References
Panario, D. "Smallest Components in Combinatorial Structures." Feb. 16, 1998. http://algo.inria.fr/seminars/sem97-98/panario.pdf.Referenced on Wolfram|Alpha
Buchstab FunctionCite this as:
Weisstein, Eric W. "Buchstab Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BuchstabFunction.html