Results 111 to 120 of about 38,188 (251)
On Matrix-Valued Herglotz Functions
, 1997 We provide a comprehensive analysis of matrix-valued Herglotz functions and illustrate their applications in the spectral theory of self-adjoint Hamiltonian systems including matrix-valued Schr\"odinger and Dirac-type operators.
Gesztesy, Fritz, Tsekanovskii, Eduard
core +1 more source
Dynamic Earthquake Source Inversion With Generative Adversarial Network Priors
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.Abstract Dynamic earthquake source inversion consists of inferring frictional parameters and initial stress on a fault consistent with recorded seismological and geodetic data and with dynamic earthquake rupture models. In a Bayesian inversion approach, the nonlinear relationship between model parameters and data requires a computationally demanding ...
Jan Premus, Jean Paul Ampuero
wiley +1 more source
The Duistermaat index and eigenvalue interlacing for self-adjoint extensions of a symmetric operator [PDF]
, 2023 Gregory Berkolaiko +3 more
openalex +1 more source
A Deep Learning‐Based Time Shift Objective Function for Full Waveform Inversion
Geophysical Prospecting, Volume 74, Issue 3, March 2026.ABSTRACT Full waveform inversion (FWI) is a powerful technique for estimating high‐resolution subsurface velocity models by minimizing the discrepancy between modelled and observed seismic data. However, the oscillatory nature of seismic waveforms makes point‐wise discrepancy measures highly prone to cycle skipping, especially when the initial velocity
Mustafa Alfarhan +5 more
wiley +1 more source
Trade costs, infrastructure, and dynamics in a global economy
International Journal of Economic Theory, Volume 22, Issue 1, Page 40-62, March 2026.Abstract This study develops a dynamic two‐country model with trade costs linked to international infrastructure stock. With variable markups and firm heterogeneity, the welfare impact of trade costs depends on firms' cost distribution. Governments engage in a dynamic public investment game, leading to multiple steady states. The dynamic equilibrium of
Akihiko Yanase
wiley +1 more source
Self-adjoint Extensions of Schrödinger Operators with ?-magnetic Fields on Riemannian Manifolds
Acta Polytechnica, 2010 We consider the magnetic Schr¨odinger operator on a Riemannian manifold M. We assume the magnetic field is given by the sum of a regular field and the Dirac δ measures supported on a discrete set Γ in M.
T. Mine
doaj
Geometric Algebras and Fermion Quantum Field Theory
QuantaCorresponding to a finite dimensional Hilbert space $H$ with $\dim H=n$, we define a geometric algebra $\mathcal{G}(H)$ with $\dim\left[\mathcal{G}(H)\right]=2^n$. The algebra $\mathcal{G}(H)$ is a Hilbert space that contains $H$ as a subspace.
Stan Gudder
doaj +1 more source
Self-Adjoint Extension Schemes and Modern Applications to Quantum Hamiltonians [PDF]
, 2023 Matteo Gallone, Alessandro Michelangeli
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On the Absolutely Continuous Spectrum of Self-Adjoint Extensions
Journal of Functional Analysis, 1995 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Brasche, Johannes F., Neidhardt, Hagen
openaire +3 more sources
Scattering theory for difference equations with operator coefficients
Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.Abstract We investigate a class of second‐order difference equations featuring operator‐valued coefficients with the aim of approaching problems of stationary scattering theory. We focus on various compact perturbations of the discrete Laplacian given in a Hilbert space of bi‐infinite square‐summable sequences with entries from a fixed Hilbert space ...
David Sher +3 more
wiley +1 more source