In this paper we construct an infinite horizon LQ optimal controller for a linear stationary differential-algebraic equation (DAE) and prove that stabilizability from the given initial state is necessary and sufficient for the controller existence. We also solve the problem of finite horizon LQ optimal control. Our approach is based on ideas from linear geometric control theory that allows one ...

In this paper we propose a Lagrangian method for solving Lane-Emden equation which is a nonlinear ordinary differential equation on semi-infinite interval. This approach is based on a Modified generalized Laguerre functions Lagrangian method. The method reduces the solution of this problem to the solution of a system of algebraic equations. We also present the comparison of this work with some ...

The system of a closed vortex filament is an integrable Hamiltonian one, namely, a Hamiltonian system with an infinite sequense of constants of motion in involution. An algebraic framework is given for the aim of describing differential geometry of this system. A geometrical structure related to the integrability of this system is revealed. It is not a bi-Hamiltonian structure but similar one. ...

The Adomian’s decomposition method (ADM) is a solution method with a wide range of applications including the solution of algebraic, differential, integral and integro-differential equations or system of equations. This method was first introduced by Adomian [1, 2] in the beginning of the 1980’s. In this method the solution is considered as an rapidly converging, infinite series. The convergenc...

Sequences of unit vectors for which the Kaczmarz algorithm always converges in Hilbert space can be characterized in frame theory by tight frames with constant 1. We generalize this result to the context of frames and bases. In particular, we show that the only effective sequences which are Riesz bases are orthonormal bases. Moreover, we consider the infinite system of linear algebraic equation...

The problem of diffraction a TE-polarized electromagnetic wave by circular slotted cylinder is investigated. boundary value in question for the Helmholtz equation reduced to an infinite system linear algebraic equations second kind (SLAE-II) using integral summation identities (ISI). A detailed study matrix operator performed and its Fredholm property weighted Hilbert space sequences proven. co...

This paper is a reflection on activities designed for computer-enhanced in-service training of high school mathematics teachers. The goal of these activities is twofold: to promote advanced mathematical thinking, and to introduce new uses of existing technology tools. The authors suggest using jointly a computer-based graphing calculator, a dynamic geometry program, and a spreadsheet program in...

We study infinite-horizon nonstationary Markov decision processes with discounted cost criterion, finite state space, and side constraints. This problem can equivalently be formulated as a countably infinite linear program (CILP), a linear program with countably infinite number of variables and constraints. We provide a complete algebraic characterization of extreme points of the CILP formulati...

We show an explicit formula, with a quite easy deduction, for the exponential matrix $e^{tA}$ of real and finite square $A$ (and complex ones also). The elementary method developed avoids Jordan canonical form, eigenvectors, resolution any linear system, inversion, polynomial interpolation, integration, functional analysis, generalized Fibonacci sequences. basic tools are Cayley-Hamilton theore...

In this paper, a new numerical method for solving fractional optimal control problems (FOCPs) is presented. The fractional derivative in the dynamic system is described in the Caputo sense. The method is based upon biorthogonal cubic Hermite spline multiwavelets approximations. The properties of biorthogonal multiwavelets are first given. The operational matrix of fractional Riemann-Lioville in...