Franz Peherstorfer, Alexander Volberg, Petro Yudytskiy, F. Nazarov,
"Asymptotics of the best polynomial approximation of $| x| ^p$ and of the best Laurent polynomial approximation of $sgn(x)$ on two symmetric intervals"
, in Constructive Approximation, Vol. 29, Nummer 1,2, Seite(n) 23?39, 2009, ISSN: 1432-0940
Original Titel:
Asymptotics of the best polynomial approximation of $| x| ^p$ and of the best Laurent polynomial approximation of $sgn(x)$ on two symmetric intervals