@Article{Cho2021,
author = "Cho, Minsung and Hoisington, Seth and Nichols, Roger and Udall, Brian",
title = "The Krein-von Neumann extension of a regular even order quasi-differential operator",
journal = "Opuscula Math.",
year = "2021",
volume = "41",
number = "6",
pages = "805--841",
doi = "https://doi.org/10.7494/OpMath.2021.41.6.805",
url = "https://doi.org/10.7494/OpMath.2021.41.6.805",
abstract = "We characterize by boundary conditions the Krein-von Neumann extension of a strictly positive minimal operator corresponding to a regular even order quasi-differential expression of Shin-Zettl type. The characterization is stated in terms of a specially chosen basis for the kernel of the maximal operator and employs a description of the Friedrichs extension due to Möller and Zettl.",
keywords = "Krein-von Neumann extension, regular quasi-differential operator",
issn = "1232-9274"
}