@book{83ee0411dbba499ca9760241eb32f891,
title = "The norm of an averaging operator",
abstract = "We consider the operator $A: \ell^2 \to \ell^2$ defined by $A(a) = b$ for $a=(a_n)$ and $b=(b_n)$ with $b_n=\dfrac1n (a_1+a_2+\dots + a_n)$. We prove that $A$ has norm 2.",
keywords = "METIS-200343, IR-65765, MSC-47B37, EWI-3398, MSC-46B45",
author = "Ruud Martini and Post, {Gerhard F.}",
note = "Imported from MEMORANDA",
year = "2001",
language = "Undefined",
isbn = "0169-2690",
series = "Memorandum / Department of Applied Mathematics",
publisher = "Meetkundig en toegepast-algebraisch onderzoek",
number = "1578",
}