Results 51 to 60 of about 480 (63)

Efficient numerical computation of the basic reproduction number for structured populations. [PDF]

J Comput Appl Math, 2021
Breda D, Florian F, Ripoll J, Vermiglio R.   +3 more
europepmc   +1 more source

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  

Collocation of Next-Generation Operators for Computing the Basic Reproduction Number of Structured Populations. [PDF]

J Sci Comput, 2020
Breda D, Kuniya T, Ripoll J, Vermiglio R.   +3 more
europepmc   +1 more source

Perron-Frobenius and Krein-Rutman theorems for tangentially positive operators

Open Mathematics, 2012
Kanigowski Adam, Kryszewski Wojciech
doaj   +1 more source

Approximation of eigenvalues for unbounded Jacobi matrices using finite submatrices

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

RIGHT SEMIDEFINITE EIGENVALUE PROBLEMS

Proceedings of the Edinburgh Mathematical Society, 2003
P. Binding, H. Volkmer
semanticscholar   +1 more source

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A Non-Ersatz Material Approach for the Topology Optimization of Elastic Structures Based on Piecewise Constant Level Set Method

Communications in Computational Physics, 2021
The topology optimization of a linearized elasticity system with the area (volume) constraint is investigated. A non-ersatz material approach is proposed.
Zhengfang Zhang
semanticscholar   +1 more source

Computation of Eigenvalues of Discrete Lower Semibounded Operators

, 2016
Based on the Galerkin method, the formulas for eigenvalues of discrete lower semibounded operators were obtained. Numerical experiments demonstrated high accuracy and computational eciency of them.
S. I. Kadchenko, Russian Federation., G. A. Zakirova   +2 more
semanticscholar   +1 more source

The Coupling Constant Threshold Effects for One-Particle Schrödinger-Type Operators in Lattice

Journal of Geometry and Symmetry in Physics
We investigate the threshold effects self-adjoint bounded discrete Schrödinger-type operators in the Hilbert space of square-summable complex-valued functions defined on the d -dimensional lattice and establish the existence of eigenvalues and their ...
Firdavs Almuratov, Xurshid Sharipov, Salokhiddin Alimov   +2 more
semanticscholar   +1 more source

On class of nonhomogeneous discrete Dirichlet problems

, 2014
This work deals with the nonhomogeneous discrete Dirichlet eigenvalue problem −∆ (( |∆u(k−1)|p1(k−1)−2+|∆u(k−1)|p2(k−1)−2 ) ∆u(k−1) ) = λ|u|q(k)−2u, k ∈ [1, T ].
A. Ayoujil
semanticscholar   +1 more source