Results 41 to 50 of about 243,973 (317)
Discrete-time population dynamics on the state space of measures
Mathematical Biosciences and Engineering, 2020 If the individual state space of a structured population is given by a metric space S, measures μ on the σ-algebra of Borel subsets T of S offer a modeling tool with a natural interpretation: μ(T) is the number of individuals with structural ...
Horst R. Thieme
doaj +1 more source
Simple eigenvectors of unbounded operators of the type “normal plus compact” [PDF]
Opuscula Mathematica, 2015 The paper deals with operators of the form \(A=S+B\), where \(B\) is a compact operator in a Hilbert space \(H\) and \(S\) is an unbounded normal one in \(H\), having a compact resolvent.
Michael Gil'
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Frontiers in Physiology, 2023 Introduction: Diffusion tensor imaging (DTI) is a magnetic resonance imaging (MRI) technique that measures the anisotropy of water diffusion. Clinical magnetic resonance imaging scanners enable visualization of the structural integrity of larger axonal ...
Luka Pušnik +5 more
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, 2008 We present a new algorithm that computes eigenvalues and eigenvectors of a Hermitian positive definite matrix while solving a linear system of equations with Conjugate Gradient (CG).
Andreas Stathopoulos +5 more
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On a q-extension of Mehta's eigenvectors of the finite Fourier transform for q a root of unity [PDF]
, 2009 It is shown that the continuous q-Hermite polynomials for q a root of unity have simple transformation properties with respect to the classical Fourier transform.
Allaway Wm R +21 more
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How can we naturally order and organize graph Laplacian eigenvectors?
, 2018 When attempting to develop wavelet transforms for graphs and networks, some researchers have used graph Laplacian eigenvalues and eigenvectors in place of the frequencies and complex exponentials in the Fourier theory for regular lattices in the ...
Saito, Naoki
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Star Algebra Spectroscopy [PDF]
, 2001 The spectrum of the infinite dimensional Neumann matrices M^{11}, M^{12} and M^{21} in the oscillator construction of the three-string vertex determines key properties of the star product and of wedge and sliver states.
Ashoke Sen +21 more
core +2 more sources
Magnetic‐Field Dependent VB− Spin Decoherence in Hexagonal Boron Nitrides: A First‐Principles Study
Advanced Functional Materials, EarlyView.This study investigates the decoherence of the VB− defect in h‐BN under external magnetic fields using first‐principles quantum many‐body simulations. A transition boundary distinguishing distinct decoherence regimes is identified, with its dependence on isotopic composition.
Jaewook Lee +3 more
wiley +1 more source
Eigenvectors for nonlinear maps [PDF]
Topological Methods in Nonlinear Analysis, 1993 The authors give a systematic and self-contained survey on nonlinear eigenvalue theory for mappings in Banach spaces. The presentation builds on topological degree and fixed point theory. Classes of operators considered are compact, condensing, and monotone (with respect to a cone) operators. Multivalued acyclic-valued operators are discussed as well.
Fournier, Gilles, Martelli, Mario
openaire +3 more sources
Eigenvectors of block circulant and alternating circulant matrices [PDF]
, 2005 The eigenvectors and eigenvalues of block circulant matrices had been found for real symmetric matrices with symmetric submatrices, and for block circulant matrices with circulant submatrices. The eigenvectors are now found for general block circulant
Tee, Garry J.
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