Results 31 to 40 of about 675,086 (262)

Maass cusp forms for large eigenvalues [PDF]

, 2003
We investigate the numerical computation of Maass cusp forms for the modular group corresponding to large eigenvalues. We present Fourier coefficients of two cusp forms whose eigenvalues exceed r=40000.
Then, H.
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Using Matrix Eigenvalues to Construct an Iterative Method with the Highest Possible Efficiency Index Two

Mathematics, 2022
In this paper, we first derive a family of iterative schemes with fourth order. A weight function is used to maintain its optimality. Then, we transform it into methods with several self-accelerating parameters to reach the highest possible convergence ...
Malik Zaka Ullah, Vali Torkashvand, Stanford Shateyi, Mir Asma   +3 more
doaj   +1 more source

Steklov problem on differential forms [PDF]

, 2017
In this paper we study spectral properties of Dirichlet-to-Neumann map on differential forms obtained by a slight modification of the definition due to Belishev and Sharafutdinov.
De Jong, Frank J., Harrison, J. (John), Jutten, Roos J., Lee Meeuw Kjoe, P.R. (Philippe R.), Opmeer, Esther, Ritchie, C.W. (Craig W.), Scheltens, Philip, Schoonenboom, Niki, Sikkes, Sietske A.M.   +8 more
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ISI spectral radii and ISI energies of graph operations

Frontiers in Physics, 2023
Graph energy is defined to be the p-norm of adjacency matrix associated to the graph for p = 1 elaborated as the sum of the absolute eigenvalues of adjacency matrix.
Ahmad Bilal, Muhammad Mobeen Munir, Muhammad Imran Qureshi, Muhammad Athar   +3 more
doaj   +1 more source

Eigenvalue spectrum for single particle in a spheroidal cavity: A Semiclassical approach [PDF]

, 2002
Following the semiclassical formalism of Strutinsky et al., we have obtained the complete eigenvalue spectrum for a particle enclosed in an infinitely high spheroidal cavity.
A. K. JAIN, Brack M., Jain A. K., Meier P., S. R. JAIN, SHAM S. MALIK, Strutinsky V. M.   +6 more
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Bounds for Degree-Sum adjacency eigenvalues of a graph in terms of Zagreb indices [PDF]

Computer Science Journal of Moldova, 2021
For a graph $G$ the degree sum adjacency matrix $DS_A(G)$ is defined as a matrix, in which every element is sum of the degrees of the vertices if and only if the corresponding vertices are adjacent, otherwise it is zero.
Sumedha S. Shinde, Narayan Swamy, Shaila Gudimani, Harishchandra S. Ramane   +3 more
doaj  

Spectral characteristics of the integral operator of the internal problem of electrodynamics for elliptical frame structure

Физика волновых процессов и радиотехнические системы, 2023
The article is devoted to the analysis of electrodynamic properties elliptical frame structure. Taking into account double symmetry internal problem of electrodynamics for the structure under consideration in the framework of the thin-wire approximation ...
Dmitry P. Tabakov, Andrey G. Mayorov
doaj   +1 more source

Krein signature for instability of $\mathcal{PT}$-symmetric states

, 2017
Krein quantity is introduced for isolated neutrally stable eigenvalues associated with the stationary states in the $\mathcal{PT}$-symmetric nonlinear Schr\"{o}dinger equation.
Chernyavsky, Alexander, Pelinovsky, Dmitry E.   +1 more
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Eigenvalue inequalities for the buckling problem of the drifting Laplacian of arbitrary order

Advances in Nonlinear Analysis, 2022
In this paper, we investigate the buckling problem of the drifting Laplacian of arbitrary order on a bounded connected domain in complete smooth metric measure spaces (SMMSs) supporting a special function, and successfully obtain a general inequality for
Du Feng, Hou Lanbao, Mao Jing, Wu Chuanxi   +3 more
doaj   +1 more source

On determining the number of spikes in a high-dimensional spiked population model

, 2011
In a spiked population model, the population covariance matrix has all its eigenvalues equal to units except for a few fixed eigenvalues (spikes).
Passemier, Damien, Yao, Jian-Feng
core   +3 more sources