Results 31 to 40 of about 6,739 (179)

Holomorphic extension of eigenfunctions [PDF]

open access: yesMathematische Annalen, 2009
8p, no ...
Krötz, Bernhard, Schlichtkrull, Henrik
openaire   +3 more sources

ON STABILIZATION PROBLEM FOR A LOADED HEAT EQUATION: THE TWO-DIMENSIONAL CASE

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2021
One of the important properties that characterize the behavior of solutions of boundary value problems for differential equations is stabilization, which has a direct relationship with the problems of controllability.
A. M. Ayazbaeva   +2 more
doaj   +1 more source

Generalized Eigenfunction Expansions

open access: yes, 2014
Generalized eigenfunction expansions based on commutator relations. Improving on the embeddings obtained by Hilbert-Schmidt-Riggings.
Emin Karayel (626216)
core   +1 more source

Eigenfunctions in Finsler Gaussian solitons

open access: yesOpen Mathematics, 2023
Gaussian solitons are important examples in the theory of Riemannian measure space. In the first part, we explicitly characterize the first eigenfunctions of the drift Laplacian in a Gaussian shrinking soliton, which shows that apart from each coordinate
Liu Caiyun, Yin Songting
doaj   +1 more source

Periodic boudary-value problem for Hill's equation in the case of parametric resonance [PDF]

open access: yesКомпьютерные исследования и моделирование, 2014
Necessary and sufficient conditions for the existence of solutions of nonlinear nonautonomous periodic problem for Hills equation in the case of parametric resonance.
Petr Viktorovich Kulish   +2 more
doaj   +1 more source

An uncertainty principle for eigenfunction expansions

open access: yes, 1995
In this paper, we extend a theorem of Hardy's on Fourier transform pairs to: (a) a noncompact-type Riemannian symmetric space of rank one, with respect to the eigenfunction expansion of the invariant Laplacian; (b) a compact Riemannian manifold with ...
Sundari, M.   +3 more
core   +1 more source

Coupled heat and mass transfer in reactive parallel‐plate flow: A perturbative Graetz model with modal symmetry and Arrhenius kinetics

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
A perturbative Graetz model describes coupled heat and mass transfer in reactive Couette–Poiseuille flow between parallel plates. Viscous dissipation and heat of reaction produce a small temperature rise, which enhances Arrhenius reaction rates and modestly accelerates axial species conversion in the small‐Brinkman‐number regime.
Leonardo Damián Soria Rodríguez   +1 more
wiley   +1 more source

On a boundary problem for the fourth order equation with the third derivative with respect to time

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2023
In this paper, we consider a boundary value problem in a rectangular domain for a fourth-order homogeneous partial differential equation containing the third derivative with respect to time. The uniqueness of the solution of the stated problem is proved
Yu.P. Apakov, D.M. Meliquzieva
doaj   +1 more source

An eigenfunction expansion-variational method for the anti-plane electroelastic behavior of three-phase fiber composites

open access: yes, 2011
The anti-plane electroelastic behavior of three-phase piezoelectric composites (fiber/interphase/matrix) with doubly periodic microstructures is dealt with.
蒋持平   +3 more
core   +1 more source

Power spectral density and the brain

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract Time series from M/EEG (magneto/electroencephalography) and ECoG (electrocorticography) recordings are common sources of information about brain function. The power spectral density (PSD) preserves much of this information, up to second order. In the current decade, a burst of brain diagnostics using the slope of log(PSD) has appeared.
Priscilla E. Greenwood   +2 more
wiley   +1 more source

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