Results 71 to 80 of about 42,410 (200)

Existence of viscosity solution for a singular Hamilton–Jacobi equation

open access: yesArab Journal of Mathematical Sciences, 2015
In this paper we study the existence of a singular Hamilton–Jacobi equation under the framework of viscosity solutions. The analysis is inspired by the arguments of [8] where a study of a model on dislocation dynamics was considered.
H. Ibrahim, S. Zabad
doaj   +1 more source

First and second sharp constants in Riemannian Gagliardo–Nirenberg inequalities

open access: yesMathematische Nachrichten, Volume 299, Issue 3, Page 617-636, March 2026.
Abstract Let (M,g)$(M,g)$ be a smooth compact Riemannian manifold of dimension n≥2$n\ge 2$, 1
Jurandir Ceccon   +2 more
wiley   +1 more source

Stochastic differential equations harvesting optimization with stochastic prices: Formulation and numerical solution

open access: yesResults in Applied Mathematics
This work aims to achieve optimal harvesting in a random setting with a stochastic price structure. We use a general growth function to model the harvested population, a geometric Brownian motion to model price change, and add fluctuations in the ...
Miguel Reis, Nuno M. Brites
doaj   +1 more source

Numerical Construction of Viable Sets for Autonomous Conflict Control Systems

open access: yesMathematics, 2014
A conflict control system with state constraints is under consideration. A method for finding viability kernels (the largest subsets of state constraints where the system can be confined) is proposed.
Nikolai Botkin, Varvara Turova
doaj   +1 more source

An Integral Equation Approach to the Irreversible Investment Problem with a Finite Horizon

open access: yesMathematics, 2020
This paper studies an irreversible investment problem under a finite horizon. The firm expands its production capacity in irreversible investments by purchasing capital to increase productivity.
Junkee Jeon, Geonwoo Kim
doaj   +1 more source

Optimal Feedback Control of Cancer Chemotherapy Using Hamilton–Jacobi–Bellman Equation

open access: yesComplexity, 2022
Cancer chemotherapy has been the most common cancer treatment. However, it has side effects that kill both tumor cells and immune cells, which can ravage the patient’s immune system. Chemotherapy should be administered depending on the patient’s immunity
Yong Dam Jeong   +5 more
doaj   +1 more source

Symmetries of the Hamilton–Jacobi equation [PDF]

open access: yesJournal of Mathematical Physics, 1977
We present a detailed discussion of the infinit esimal symmetries of the Hamilton-Jacobi equation (an arbitrary first order partial equation) Our presentation clucidates the role played by the characteristic system in determining the symmetries. We then specialize to the case of a free particle in one space and one time dimension, and study of local ...
Boyer, C.P., Kalnins, Ernie G.
openaire   +3 more sources

Carboniferous fossils enlighten the systematics and evolution of Hemiptera

open access: yesPapers in Palaeontology, Volume 12, Issue 2, March/April 2026.
Abstract Fossils are witnesses to the evolutionary processes undergone by living lineages. The earliest occurrence of clades provides rich insights into the timing of diversification of lineages and better delimits the groups that compose them. Hemiptera are a remarkable order within the insects due to their high morphological and ecological diversity.
Mathieu Boderau   +8 more
wiley   +1 more source

An application of global gradient estimates in Lorentz-Morrey spaces for the existence of stationary solutions to degenerate diffusive Hamilton-Jacobi equations

open access: yesElectronic Journal of Differential Equations, 2019
In mathematics and physics, the Kardar-Parisi-Zhang equation or quasilinear stationary version of a time-dependent viscous Hamilton-Jacobi equation in growing interface and universality classes is also known as the quasilinear Riccati type equation ...
Minh-Phuong Tran, Thanh-Nhan Nguyen
doaj  

The Quantum Effective Mass Hamilton-Jacobi Problem

open access: yes, 2010
In this article, the quantum Hamilton- Jacobi theory based on the position dependent mass model is studied. Two effective mass functions having different singularity structures are used to examine the Morse and Poschl- Teller potentials.
Ablowitz M J   +25 more
core   +1 more source

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