Results 61 to 70 of about 920,770 (191)

Systems of Controlled Functional Differential Equations and Adaptive Tracking [PDF]

SIAM Journal on Control and Optimization, 2002
The authors address a servomechanism problem in the context of a class of controlled dynamical systems modeled by functional differential equations, and they develop an adaptive servomechanism which, for every system of the underlying class, ensures practical tracking (with prescribed asymptotic accuracy), by the system output, of an arbitrary ...
Ilchmann, A., Ryan, E. P., Sangwin, C. J.   +2 more
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Periodic solutions for a system of nonlinear neutral functional difference equations with two functional delays [PDF]

Mathematica Moravica, 2015
In this paper, we study the existence and uniqueness of periodic solutions of the system of nonlinear neutral difference equations ∆x (n) = A(n) x (n - t (n)) + ∆Q(n; x (n - g (n))) + G(n; x (n) ; x (n - g (n))).
Mesmouli Billah Mouataz, Ardjouni Abdelouaheb, Djoudi Ahcene   +2 more
doaj  

Self-Similar Solutions with Elliptic Symmetry for the Compressible Euler and Navier-Stokes Equations in R^{N}

, 2011
Based on Makino's solutions with radially symmetry, we extend the corresponding ones with elliptic symmetry for the compressible Euler and Navier-Stokes equations in R^{N} (N\geq2).
Yuen, Manwai
core   +1 more source

The Stability of Bi-Drygas Functional Equation [PDF]

Sahand Communications in Mathematical Analysis
In this paper, we introduce and solve a system of bi-Drygas functional equations \begin{equation}\left\{\begin{aligned}        &f(x+y,z)+f(x-y,z)=2f(x,z)+f(y,z)+f(-y,-z)\nonumber\\        &f(x,y+z)+f(x, y-z)=2f(x,y)+f(x,z)+f(-x,-z)\nonumber\end{aligned ...
Mehdi Dehghanian, Sadegh Izadi, Yamin Sayyari   +2 more
doaj   +1 more source

Systems of functional-differential equations with asymptotically constant solutions [PDF]

Proceedings of the American Mathematical Society, 1988
Sufficient conditions are given for a nonlinear system of differential equations with deviating arguments to have solutions which approach finite limits as t → ∞ t \to \infty . No specific assumptions other than continuity are imposed on the deviating arguments.
William F. Trench, Takasi Kusano
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Weak solutions to problems involving inviscid fluids

, 2015
We consider an abstract functional-differential equation derived from the pressure-less Euler system with variable coefficients that includes several systems of partial differential equations arising in the fluid mechanics.
C Audiard, C Lellis De, CM Dafermos, CM Dafermos, D Bresch, E Chiodaroli, E Chiodaroli, J Lowengrub, L Desvillettes, M Kotschote, M Kotschote, P Antonelli, P Antonelli, S Benzoni-Gavage, S Benzoni-Gavage   +14 more
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POSITIVE PERIODIC SOLUTIONS OF SYSTEMS OF FUNCTIONAL DIFFERENTIAL EQUATIONS [PDF]

Journal of the Korean Mathematical Society, 2005
The authors study the existence of the positive periodic solutions of the functional differential equations \[ x'(t)=A(t)x(t)+\lambda f(t, x(t-\tau(t))). \] By applying a cone theoretic fixed point theorem, the authors obtain some sufficient conditions for the existence of positive periodic solutions of the above equation.
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On solvability of functional equations and system of functional equations arising in dynamic programming

Journal of Mathematical Analysis and Applications, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, Z, Agarwal, R.P, Kang, S.M
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SOME EXISTENCE THEOREMS FOR FUNCTIONAL EQUATIONS AND SYSTEM OF FUNCTIONAL EQUATIONS ARISING IN DYNAMIC PROGRAMMING

Taiwanese Journal of Mathematics, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, Zeqing, Ume, Jeong Sheok, Kang, Shin Min   +2 more
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A Pexider system of additive functional equations in Banach algebras

Journal of Inequalities and Applications
In this paper, we solve the system of functional equations { f ( x + y ) + g ( y − x ) = 2 f ( x ) , g ( x + y ) − f ( y − x ) = 2 g ( y ) $$\begin{aligned} \textstyle\begin{cases} f(x+y)+g(y-x)=2f(x), \\ g(x+y)-f(y-x)=2g(y) \end{cases}\displaystyle \end{
Mehdi Dehghanian, Yamin Sayyari, Siriluk Donganont, Choonkil Park   +3 more
doaj   +1 more source