Spectral properties of higher order anharmonic oscillators [PDF]
, 2009 We discuss spectral properties of the self-adjoint operator \[ -d^2/dt^2 + (t^{k+1}/(k+1)-\alpha)^2 \] in $L^2(\mathbb{R})$ for odd integers $k$. We prove that the minimum over $\alpha$ of the ground state energy of this operator is attained at a unique ...
Helffer, Bernard, Persson, Mikael
core
On the Gauss map of quadric surfaces
, 2019 In this paper, we study quadric surfaces in the 3-dimensional Euclidean space whose Gauss map n is of coordinate finite I-type, i.e., the position vector n satisfies the relation {\Delta}In = {\Lambda}n, where {\Delta}I is the Laplace operator with ...
Al-Zoubi, Hassan
core
Expansion of eigenvalues of the perturbed discrete bilaplacian. [PDF]
Mon Hefte Math, 2022 Kholmatov SY +2 more
europepmc +1 more source
Efficient numerical computation of the basic reproduction number for structured populations. [PDF]
J Comput Appl Math, 2021 Breda D +3 more
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Collocation of Next-Generation Operators for Computing the Basic Reproduction Number of Structured Populations. [PDF]
J Sci Comput, 2020 Breda D +3 more
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Approximation of eigenvalues for unbounded Jacobi matrices using finite submatrices
Open Mathematics, 2014 Monvel Anne, Zielinski Lech
doaj +1 more source
Perron-Frobenius and Krein-Rutman theorems for tangentially positive operators
Open Mathematics, 2012 Kanigowski Adam, Kryszewski Wojciech
doaj +1 more source
Negative Eigenvalue Estimates for the 1D Schrödinger Operator with Measure-Potential. [PDF]
Ann Henri PoincareFulsche R, Nursultanov M, Rozenblum G.
europepmc +1 more source
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