Results 101 to 110 of about 1,617 (206)
A nonlocal boundary value problem with singularities in phase variables
Mathematical and Computer Modelling, 2004 Sufficient conditions for the solvability are obtained for the second-order nonlinear boundary value problem \[ (g(x'(t)))'=f(t,x(t)),\;x'(t)),\quad x(0)=x(T)=-\gamma\min\{x(t): t\in[0,T]\}. \] Here, \(g\) is a continuous increasing odd function. The right-hand side \(f(t,x,x')>0\) may be singular both at \(x=0\) and \(x'=0\).
openaire +1 more source
The Journal of Finance, Volume 81, Issue 4, Page 2005-2062, August 2026.ABSTRACT We propose a measure of the valuation gap between debt and equity—debt‐equity spread (DES)—based on the difference between actual and equity‐implied credit spreads. DES predicts cross‐sectional stock and bond returns in opposite directions.
HUI CHEN, ZHIYAO CHEN, JUN LI
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About positivity of green's functions for nonlocal boundary value problems with impulsive delay equations. [PDF]
ScientificWorldJournal, 2014 Domoshnitsky A, Volinsky I.
europepmc +1 more source
Numerical Investigation of a Diffusive SIR Model: Focus on Positivity Preservation
Mathematical Methods in the Applied Sciences, Volume 49, Issue 11, Page 11775-11793, 30 July 2026.ABSTRACT In this paper, we consider a system of semilinear partial differential equations (PDEs) representing a spatially extended SIR epidemic model. A brief analytical investigation of the well‐posedness and positivity of the solutions is provided in the appendix, while the main focus is on the numerical treatment of the model.
Rahele Mosleh +2 more
wiley +1 more source
Weak Solutions for a Class of Nonlocal Singular Problems Over the Nehari Manifold
Mathematical Methods in the Applied Sciences, Volume 49, Issue 11, Page 12360-12378, 30 July 2026.ABSTRACT In this paper, we consider a nonlocal model of dilatant non‐Newtonian fluid with a Dirichlet boundary condition. By using the Nehari manifold and fibering map methods, we obtain the existence of at least two weak solutions, with sign information.
Zhenfeng Zhang +2 more
wiley +1 more source
Surface and Boundary Corrections in Peridynamics Using Optimized Nodal Influence Weights
International Journal for Numerical Methods in Engineering, Volume 127, Issue 14, 30 July 2026.ABSTRACT Peridynamics (PD), similarly to some other nonlocal continuum theories, exhibits truncated interaction horizons near free surfaces, cracks, and voids in bounded domains. This loss of neighbors causes artificial surface effects and inconsistencies in the derivative and energy operators that persist under discretization refinement, limiting PD ...
Arman Shojaei +5 more
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Multi-term fractional-order boundary-value problems with nonlocal integral boundary conditions
Electronic Journal of Differential Equations, 2018 In this article, we introduce a class of multi-term fractional-order boundary-value problems involving nonlocal integral boundary conditions. Existence results for the given problem are obtained by means of standard tools of fixed point theory.
Ahmed Alsaedi +4 more
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Third Harmonic Generation in Transparent Longitudinal Epsilon‐Near‐Zero Multilayers
Nanophotonics, Volume 15, Issue 14, 27 July 2026.Transparent longitudinal epsilon‐near‐zero stacks enable field‐enhanced nonlinear light generation while preserving high near‐infrared pump transmission. Broadband third‐harmonic generation is experimentally observed demonstrating that TLENZ architectures can mitigate pump‐loss limitations and offer a promising platform for transparent nonlinear ...
Wallace Jaffray +7 more
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Boundary-value problems for second-order differential operators with nonlocal boundary conditions
Electronic Journal of Differential Equations, 2007 In this paper, we study a second-order differential operator combining weighting integral boundary condition with another two-point boundary condition.
Mohamed Denche, Abderrahmane Meziani
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Nanophotonics, Volume 15, Issue 13, 13 July 2026.Numerical modeling of mesoscopic material response models that capture the quantum dynamics of electrons does not have to come with discouraging computational bottlenecks. The main message is that through a shift in perspective in modeling toward integral equation methods and exploiting symmetry‐based arguments, it is possible to capture complicated ...
Christos Mystilidis +4 more
wiley +1 more source