Unbounded Self-adjoint Operators on Hilbert Space

By K. Schmüdgen. 2012

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Boundary pairs associated with quadratic forms (2012, background): “For a recent treatment of (quasi-)boundary triples and related concepts we refer to the nice surveys [30] and [13] and the references therein (see also [80], [24], [12], [28], [22], [8], [31]).”
Efficient implementation of Markov chain Monte Carlo when using an unbiased likelihood estimator (2012, neutral): “It follows that (H, 〈·, ·〉H) and (H̃, 〈·, ·〉H̃) are Hilbert spaces by Proposition 1.4 in Schmüdgen (2012).”
Boundary Value Problems, Weyl Functions, and Differential Operators (2020, positive): “Krein’s resolvent formula (6) illustrates that spectral theory for TΘ is intimately related to the boundary values [Θ −M(λ + iε)]−1, λ ∈ R, as ε ↓ 0.”