Linear Operators in Hilbert Spaces

By Friedrich Sauvigny. 2012

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A survey of functional principal component analysis (2014, background): “Furthermore , the covariance operator Γ is a linear , self - adjoint , positive semidefinite operator ( Weidmann 1980 , p .”
A non-hyponormal operator generating Stieltjes moment sequences (2011, background): “For details on this we refer the reader to [16,19,18,20] (see also [44,6,40,22,27,42] for the unbounded case).”
Characterization of Domains of Self-Adjoint Ordinary Differential Operators II (2009, unknown): “See [26] or [38].”
Boundary Value Problems, Weyl Functions, and Differential Operators (2020, background): “For an introduction and comprehensive treatment of linear operators in Hilbert spaces and related topics we refer the reader to the standard textbooks [2, 133, 141, 272, 276, 341, 348, 598, 649, 650, 651, 652, 673, 691, 723, 738, 743, 752, 756, 757].”
Ordinary Differential Equations and Dynamical Systems (2012, unknown): “For a modern introduction to singular Sturm–Liouville problems, see the books by Weidmann [45], [46], my textbook [42], and the book by Levitan and Sargsjan [27].”
Time-Varying Periodicity in Intraday Volatility (2019, unknown): “Then, for p ∈ [1, 4] and κ ∈ (0, 1] and with $ > 1 2 − 1 p , we have E|f̂κ − f̆κ| ≤ C∆−p n [∆q(1/2−$)+2p$ n ∨∆ n ∨∆p+1−2p/q n ], (B.”