Found 3,690 Documents (Results 1–100)
Sharp upper bounds for Steklov eigenvalues of a hypersurface of revolution with two boundary components in Euclidean space. (English. French summary) Zbl 07926286
Optimal bounds for Neumann eigenvalues in terms of the diameter. (English. French summary) Zbl 07926277
Upper-lower bounds for blow-up time in initial value boundary problems for a class of pseudo-parabolic equations. (English) Zbl 07923074
Green function of a class of eigenparameter dependent third-order differential operators with discontinuity. (English) Zbl 07922828
Convexity of energy functions of harmonic maps homotopic to covering maps of surfaces. (English) Zbl 07916666
Existence of nodal solutions to some nonlinear boundary value problems for ordinary differential equations of fourth order. (English) Zbl 07911185
Properties of eigenfunctions of a boundary value problem for ordinary differential equations of fourth-order with boundary conditions depending on the spectral parameter. (English) Zbl 07910507
Recursive bounds for the eigenvalues of symmetric positive definite matrices. (English) Zbl 07907362
Exponential bounds for regularized Hotelling’s T2 statistic in high dimension. (English) Zbl 07904783
Perturbation and spectral theory for singular indefinite Sturm-Liouville operators. (English) Zbl 07901384
Reviewer: Andreas Fleige (Dortmund)
On the approximation of the first eigenvalue of some boundary value problems. (English) Zbl 07897447
Conforming element method and shifted-inverse two-grid dicretization for the fourth-order Steklov eigenvalue problem. (English) Zbl 07893870
Discontinuity of the \(n\)th eigenvalue for a vibrating beam equation. (English) Zbl 07888246
MSC:
34L15
Uniform upper bounds on Courant sharp Neumann eigenvalues of chain domains. (English) Zbl 1543.35114
Existence of solutions of a nonlinear eigenvalue problem and their properties. (English. Russian original) Zbl 07878628
Sb. Math. 215, No. 1, 52-73 (2024); translation from Mat. Sb. 215, No. 1, 59-81 (2024).
A note on Ambarzumian’s theorem for quantum graphs. (English) Zbl 07873278
Reviewer: Chuan-Fu Yang (Nanjing)
Adaptive hybrid high-order method for guaranteed lower eigenvalue bounds. (English) Zbl 07872224
Reviewer: Temur A. Jangveladze (Tbilisi)
The spectral determinant for second-order elliptic operators on the real line. (English) Zbl 07870833
On the Bloch eigenvalues, band functions and bands of the differential operator of odd order with the periodic matrix coefficients. (English) Zbl 07870832
Dependence of eigenvalue of Sturm-Liouville operators on the real coupled boundary condition. (English) Zbl 07867878
Guaranteed lower eigenvalue bounds for Steklov operators using conforming finite element methods. (English) Zbl 1541.65141
Rotation number and eigenvalues of two-component modified Camassa-Holm equations. (English) Zbl 07862781
Reviewer: Smail Djebali (Riyadh)
The regularized trace formula for a discontinuous Sturm-Liouville problem with a spectral parameter dependent jump condition. (English) Zbl 07860947
Perturbation determinant and Levinson’s formula for Schrödinger operators with 1-D general point interaction. (English) Zbl 07854814
Reviewer: Hubert Kalf (München)
On Lyapunov-type inequalities for five different types of higher order boundary value problems. (English) Zbl 1537.34051
A novel mixed spectral method and error estimates for Maxwell transmission eigenvalue problems. (English) Zbl 1541.65169
Global structure of positive solutions for \(p\)-Laplacian Neumann problem with indefinite weight. (English) Zbl 07846908
Multilevel Monte Carlo methods for stochastic convection-diffusion eigenvalue problems. (English) Zbl 07845619
Inverse spectral problem for a third-order differential operator on a finite interval. (English) Zbl 07839396
Solving nonlinear ordinary differential equations using the invariant manifolds and Koopman eigenfunctions. (English) Zbl 1541.34004
Ambarzumyan’s theorem for the Dirac operator on equilateral tree graphs. (English) Zbl 1541.34049
Reviewer: Natalia Bondarenko (Saratov)
Existence and nonexistence results for fractional mixed boundary value problems via a Lyapunov-type inequality. (English) Zbl 07829379
Estimates for \(\delta\)-periodic eigenvalues of two-component Novikov system. (English) Zbl 1539.34092
MSC:
34L15
A variable stepsize hybrid block optimized technique for integrating a class of singularly perturbed parabolic problems. (English) Zbl 1535.65164
Inverse resonance problems for energy-dependent potentials on the half-line. (English) Zbl 1542.34072
Reviewer: Jiři Lipovský (Hradec Králové)
Minimization of the first positive Neumann-Dirichlet eigenvalue for the Camassa-Holm equation with indefinite potential. (English) Zbl 1539.34093
Reviewer: Andreas Fleige (Dortmund)
On the asymptotics of eigenvalues for a Sturm-Liouville problem with symmetric single-well potential. (English) Zbl 1541.34046
Reviewer: Vladimir Vladičić (Sarajevo)
Modified-operator method for the calculation of band diagrams of crystalline materials. (English) Zbl 1533.65212
Asymptotic behavior and monotonicity of radial eigenvalues for the \(p\)-Laplacian. (English) Zbl 1540.35277
Reviewer: Mihai Mihăilescu (Craiova)
Sharp bounds for Dirichlet eigenvalue ratios of the Camassa-Holm equations. (English) Zbl 1541.34035
Reviewer: Smail Djebali (Riyadh)
Some recent developments on the Steklov eigenvalue problem. (English) Zbl 1532.58004
Reviewer: Emilio A. Lauret (Bahía Blanca)
An adaptive FEM for the elastic transmission eigenvalue problem with different elastic tensors and different mass densities. (English) Zbl 1531.65226
Direct and inverse problems for a third order self-adjoint differential operator with periodic boundary conditions and nonlocal potential. (English) Zbl 1540.34156
Reviewer: Chuan-Fu Yang (Nanjing)
Sharp estimates of lowest positive Neumann eigenvalue for general indefinite Sturm-Liouville problems. (English) Zbl 07782697
Reviewer: Andreas Fleige (Dortmund)
Negative eigenvalue estimates for the 1D Schrödinger operator with measure-potential. arXiv:2408.05980
Preprint, arXiv:2408.05980 [math.SP] (2024).
A modified local Weyl law and spectral comparison results for \(\delta'\)-coupling conditions. arXiv:2407.21719
Preprint, arXiv:2407.21719 [math.SP] (2024).
On the Fundamental Eigenvalues gap of Sturm-Liouville Operators. arXiv:2407.02459
Preprint, arXiv:2407.02459 [math.SP] (2024).
On the Laplace operator with a weak magnetic field in exterior domains. arXiv:2405.18154
Preprint, arXiv:2405.18154 [math.SP] (2024).
Reverse Lieb–Thirring inequality for the half-line matrix Schrödinger operator. arXiv:2405.00799
Preprint, arXiv:2405.00799 [math-ph] (2024).
Problem of eigenvalues of stochastic Hamiltonian systems with boundary conditions and Markov chain. arXiv:2404.10398
Preprint, arXiv:2404.10398 [math.PR] (2024).
Sharp spectral transition for embedded eigenvalues of perturbed periodic Dirac operators. arXiv:2404.08218
Preprint, arXiv:2404.08218 [math-ph] (2024).
The transformations to remove or add bound states for the half-line matrix Schrödinger operator. arXiv:2402.12136
Preprint, arXiv:2402.12136 [math-ph] (2024).
On the eigenvalues of the spheroidal wave equation. arXiv:2402.07133
Preprint, arXiv:2402.07133 [math.AP] (2024).
Floquet multipliers and the stability of periodic linear differential equations: a unified algorithm and its computer realization. (English) Zbl 07919808
Spectral analysis of a family of nonsymmetric fractional elliptic operators. (English) Zbl 1537.34088
Lieb-Thirring and Jensen sums for non-self-adjoint Schrödinger operators on the half-line. (English) Zbl 1539.34091
Computing periodic and antiperiodic eigenvalues with a PT-symmetric optical potential. (English) Zbl 1536.34078
Spectrum of a \(q\)-deformed Schrödinger equation by means of the variational method. (English) Zbl 1536.34080
Maximum and anti-maximum principles for boundary value problems for ordinary differential equations in neighborhoods of simple eigenvalues. (English) Zbl 07814870
Partially-isospectral Sturm-Liouville boundary value problems on the finite segment. (Russian. English summary) Zbl 1534.34038
Eigenvalue bounds for double saddle-point systems. (English) Zbl 1533.65052
Reviewer: Steven B. Damelin (Ann Arbor)
Continuous symmetrization and continuous increasing refinements of inequalities and monotonicity of eigenvalues. (English) Zbl 1538.26057
Eigenvalues of Sturm-Liouville problems with eigenparameter dependent boundary and interface conditions. (English) Zbl 1538.34339
Learning discrete Lagrangians for variational PDEs from data and detection of travelling waves. (English) Zbl 1534.65168
Nielsen, Frank (ed.) et al., Geometric science of information. 6th international conference, GSI 2023, St. Malo, France, August 30 – September 1, 2023. Proceedings. Part I. Cham: Springer. Lect. Notes Comput. Sci. 14071, 569-579 (2023).
A variational approach to the optimal locations of the nodes of the second Dirichlet eigenfunctions. (English) Zbl 1538.34103
On the multiple spectrum of a problem for the Bessel equation of an integer order with squared spectral parameter in the boundary condition. (English. Russian original) Zbl 1531.34033
Differ. Equ. 59, No. 10, 1440-1442 (2023); translation from Differ. Uravn. 59, No. 10, 1438-1440 (2023).
Impulsive Dirac system on time scales. (English) Zbl 1531.34085
Ukr. Math. J. 75, No. 6, 827-841 (2023) and Ukr. Mat. Zh. 75, No. 6, 723-735 (2023).
Continuous dependence of eigenvalues on potential functions for nonlocal Sturm-Liouville equations. (English) Zbl 1538.34107
PinT preconditioner for forward-backward evolutionary equations. (English) Zbl 1530.65114
MSC:
65M55
65F08
65F10
65F22
65F15
65J20
65H10
49M41
65M06
65L06
65M12
65M15
65Y05
15B05
93B05
93B20
Global bifurcation results for some fourth-order nonlinear eigenvalue problem with a spectral parameter in the boundary condition. (English) Zbl 1527.34050
Results on bounds of the spectrum of positive definite matrices by projections. (English) Zbl 1538.15022
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