Results 21 to 30 of about 331,915 (277)

Predictor control for non‐linear systems actuated via counter‐convecting transport PDEs

open access: yesIET Control Theory & Applications, 2021
The authors investigate predictor control for the cascaded system of a non‐linear ordinary differential equation with counter‐convecting transport partial differential equations with propagation velocities dependent on partial differential equations ...
Xiushan Cai   +3 more
doaj   +1 more source

Boundary value problems for partial functional differential equations [PDF]

open access: yesPacific Journal of Mathematics, 1980
468 SAMUEL M. RANKIN, III3. A. Granas, The theory of compact vector fields and some of its applications totopology and functional spaces, I. Rozprowy Mat., 30 (1962), 93.4. J. K. Hale, Functional Differential Equations, Springer-Verlag, New York, 1971.5. M. Z. Nashed and J. S. W.
openaire   +2 more sources

A Characteristic Equation for Non-autonomous Partial Functional Differential Equations

open access: yesJournal of Differential Equations, 2002
Using the evolution semigroup approach, the authors give a characterization of exponential stability for the nonautonomous partial functional-differential equation \[ \dot{u}(t) = A(t) u(t) + L(t) u_t,\quad t \geq s, \qquad u(t) = \varphi(t-s),\quad s-r \leq t \leq s, \] in terms of a generalized characteristic equation which is formulated on adequate ...
Gühring, Gabriele   +2 more
openaire   +2 more sources

Dynamics of cell growth: Exponential growth and division after a minimum cell size

open access: yesPartial Differential Equations in Applied Mathematics
In this paper, we consider a mathematical model for cell division using a Pantograph-type nonlocal partial differential equation, accompanied by relevant initial and boundary conditions. This formulation results in a nonlocal singular eigenvalue problem.
M. Mohsin, A.A. Zaidi, B. van Brunt
doaj   +1 more source

On the geometric structure of characteristic vector fields related with nonlinear equations of the Hamilton-Jacobi type [PDF]

open access: yesOpuscula Mathematica, 2007
The Cartan-Monge geometric approach to the characteristics method for Hamilton-Jacobi type equations and nonlinear partial differential equations of higher orders is analyzed.
Natalia K. Prykarpatska   +1 more
doaj  

Mathematical analysis of a one-dimensional model for an aging fluid

open access: yes, 2012
We study mathematically a system of partial differential equations arising in the modelling of an aging fluid, a particular class of non Newtonian fluids.
Benoit, David   +3 more
core   +3 more sources

A sequential regularization method for time-dependent incompressible Navier--Stokes equations [PDF]

open access: yes, 1997
The objective of the paper is to present a method, called sequential regularization method (SRM), for the nonstationary incompressible Navier-Stokes equations from the viewpoint of regularization of differential-algebraic equations (DAEs) , and to ...
Amrouche Chérif   +6 more
core   +2 more sources

A Partial Functional Differential Equation

open access: yesJournal of Mathematical Analysis and Applications, 2001
The author of this interesting paper investigates the partial functional differential equation \[ \partial u(x,t)\partial t =k \partial^2 u(x,t)\partial x^2+ru(x,t-T)[1-u(x,t)], \;\;t\geq 0, \;\;x\in [{}0,\pi ]{} \] under the boundary condition \(u(0,t)=u(\pi ,t)=0\) (\(t>0\)) and \(u(x,s)=\phi (x,s)\), \(-T\leq s\leq 0\), \(0\leq x\leq \pi \).
openaire   +2 more sources

Dynamics of the Fisher Information Metric [PDF]

open access: yes, 2004
We present a method to generate probability distributions that correspond to metrics obeying partial differential equations generated by extremizing a functional $J[g^{\mu\nu}(\theta^i)]$, where $g^{\mu\nu}(\theta^i)$ is the Fisher metric.
A. Einstein   +13 more
core   +4 more sources

Stochastic functional differential equations driven by L\'{e}vy processes and quasi-linear partial integro-differential equations

open access: yes, 2012
In this article we study a class of stochastic functional differential equations driven by L\'{e}vy processes (in particular, $\alpha$-stable processes), and obtain the existence and uniqueness of Markov solutions in small time intervals.
Zhang, Xicheng
core   +1 more source

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