Results 31 to 40 of about 600 (41)

On the point spectrum of some perturbed differential operators with periodic coefficients [PDF]

, 2007
Finiteness of the point spectrum of linear operators acting in a Banach space is investigated from point of view of perturbation theory. In the first part of the paper we present an abstract result based on analytical continuation of the resolvent ...
Cialenco, Igor
core   +1 more source

On Cayley Identity for Self-Adjoint Operators in Hilbert Spaces [PDF]

, 2011
We prove an analogue to the Cayley identity for an arbitrary self-adjoint operator in a Hilbert space. We also provide two new ways to characterize vectors belonging to the singular spectral subspace in terms of the analytic properties of the resolvent ...
Alexander V. Kiselev, N. Naboko, Serguei
core  

From Laplacian Transport to Dirichlet-to-Neumann (Gibbs) Semigroups [PDF]

, 2008
The paper gives a short account of some basic properties of \textit{Dirichlet-to-Neumann} operators $\Lambda_{\gamma,\partial\Omega}$ including the corresponding semigroups motivated by the Laplacian transport in anisotropic media ($\gamma \neq I$) and ...
Zagrebnov, Valentin
core   +3 more sources

Expansion of eigenvalues of the perturbed discrete bilaplacian. [PDF]

Mon Hefte Math, 2022
Kholmatov SY, Khalkhuzhaev A, Pardabaev M.   +2 more
europepmc   +1 more source

Approximation of eigenvalues for unbounded Jacobi matrices using finite submatrices

Open Mathematics, 2014
Monvel Anne, Zielinski Lech
doaj   +1 more source

Spectral shift functions and Dirichlet-to-Neumann maps. [PDF]

Math Ann, 2018
Behrndt J, Gesztesy F, Nakamura S.
europepmc   +1 more source

Molecular Ecological Basis of Grasshopper (Oedaleus asiaticus) Phenotypic Plasticity under Environmental Selection. [PDF]

Front Physiol, 2017
Qin X, Hao K, Ma J, Huang X, Tu X, Ali MP, Pittendrigh BR, Cao G, Wang G, Nong X, Whitman DW, Zhang Z.   +11 more
europepmc   +1 more source

Revisiting the construction of gap functions for variational inequalities and equilibrium problems via conjugate duality

Open Mathematics, 2013
Cioban Liana, Csetnek Ernö
doaj   +1 more source

Analysis of eigenvalue condition numbers for a class of randomized numerical methods for singular matrix pencils. [PDF]

BIT Numer Math
Kressner D, Plestenjak B.
europepmc   +1 more source

Efficacy and safety of anrikefon injection for postoperative analgesia in specific patient groups (elderly, liver damage, renal damage) after abdominal surgery. [PDF]

J Anesth Transl Med
Xu Y, Zhang T, Huang X, Tuerhong S, Chen X.   +4 more
europepmc   +1 more source