Results 11 to 20 of about 708,238 (289)

Chandrasekhar quadratic and cubic integral equations via Volterra-Stieltjes quadratic integral equation

open access: yesDemonstratio Mathematica, 2021
In this work, we study the existence of one and exactly one solution x∈C[0,1]x\in C\left[0,1], for a delay quadratic integral equation of Volterra-Stieltjes type.
El-Sayed Ahmed M. A., Omar Yasmin M. Y.
doaj   +1 more source

A nonlinear Bismut-Elworthy formula for HJB equations with quadratic Hamiltonian in Banach spaces [PDF]

open access: yes, 2019
We consider a Backward Stochastic Differential Equation (BSDE for short) in a Markovian framework for the pair of processes $(Y,Z)$, with generator with quadratic growth with respect to $Z$.
Addona, Davide   +2 more
core   +2 more sources

On Polynomial Solutions of Pell’s Equation

open access: yesJournal of Mathematics, 2021
Polynomial Pell’s equation is x2−Dy2=±1, where D is a quadratic polynomial with integer coefficients and the solutions X,Y must be quadratic polynomials with integer coefficients. Let D=a2x2+a1x+a0 be a polynomial in Zx.
Hasan Sankari, Ahmad Abdo
doaj   +1 more source

Stability and improved physical characteristics of relativistic compact objects arising from the quadratic term in $$p_r = \alpha \rho ^2 + \beta \rho - \gamma $$ p r = α ρ 2 + β ρ - γ

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We investigate the stability and enhancement of the physical characteristics of compact, relativistic objects which follow a quadratic equation of state. To achieve this, we make use of the Vaidya–Tikekar metric potential.
S. Thirukkanesh   +3 more
doaj   +1 more source

Short-time existence of solutions for mean-field games with congestion [PDF]

open access: yes, 2015
We consider time-dependent mean-field games with congestion that are given by a system of a Hamilton-Jacobi equation coupled with a Fokker-Planck equation. The congestion effects make the Hamilton-Jacobi equation singular.
Gomes, Diogo, Voskanyan, Vardan
core   +2 more sources

Quadratic vector equations [PDF]

open access: yesLinear Algebra and its Applications, 2011
We study in an unified fashion several quadratic vector and matrix equations with nonnegativity hypotheses. Specific cases of such problems (QBD equations, nonsymmetric algebraic Riccati equations, Lu's simple equation, Markovian binary trees equations) have been studied extensively in the past by several authors.
openaire   +3 more sources

Classification of generalized ternary quadratic quasigroup functional equations of the length three

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2019
A functional equation is called: generalized if all functional variables are pairwise different; ternary if all its functional variables are ternary; quadratic if each individual variable has exactly two appearances; quasigroup if its solutions are ...
F.M. Sokhatsky, A.V. Tarasevych
doaj   +1 more source

Hyers-Ulam Stability of Functional Equation Deriving from Quadratic Mapping in Non-Archimedean n,β-Normed Spaces

open access: yesJournal of Function Spaces, 2021
In this work, we have to introduce a generalized quadratic functional equation and derive its solution. The main objective of this work is to investigate the Hyers-Ulam stability of quadratic functional equation in non-Archimedean n,β-normed spaces.
Nazek Alessa   +3 more
doaj   +1 more source

Soliton-like Solutions of General Variable Coefficient Cylindrical/Spherical KdV Equation

open access: yesMathematics, 2022
The general variable coefficient cylindrical/spherical KdV equation has been investigated by using the simplified homogeneous balance method. It has been proven that if its coefficients satisfy certain constraint conditions, then the cylindrical ...
Lingxiao Li, Mingliang Wang
doaj   +1 more source

Quadratic Liénard Equations with Quadratic Damping

open access: yesJournal of Differential Equations, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dumortier, Freddy, Li, C.
openaire   +3 more sources

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