A Note on Some Theorems for Ordinary Differential Equation

A RESEARCH NOTE ON THE SECOND ORDER DIFFERENTIAL EQUATION

Let U(t, ) be solution of the Dirichlet problem y''+( t-q(t))y= 0 - 1 t l y(-l)= 0 = y(x), with variabIe t on (-1, x), for fixed x, which satisfies the initial condition U(-1, )=0 , (-1, )=1. In this paper, the asymptotic representation of the corresponding eigenfunctions of the eigen values has been investigated . Furthermore, the leading term of the asymptotic formula for ...

A Note on Solving Prandtl's Integro-Differential Equation

A simple method for solving Prandtl's integro-differential equation is proposed based on a new reproducing kernel space. Using a transformation and modifying the traditional reproducing kernel method, the singular term is removed and the analytical representation of the exact solution is obtained in the form of series in the new reproducing kernel space. Compared with known investigations, its ...

Note on Some Gap Theorems

Some Oscillation Theorems for Systems of Partial Differential Equations with Deviating Arguments and a Note on Impulsive Hyperbolic Equation

Recently, the oscillation of solutions for higher-order partial differential equations with deviating arguments is widely usually discussed (see [2]-[4]etc), Aside from their intrinsic interest, oscillation of solutions is very important in the domain of physics(this things are interesting with some example). In this paper, we consider a more generalized higher –order equation Now in the direct...

A Universal Ordinary Differential Equation

An astonishing fact was established by Lee A. Rubel in 81: there exists a fixed non-trivial fourthorder polynomial differential algebraic equation (DAE) such that for any positive continuous function φ on the reals, and for any positive continuous function (t), it has a C∞ solution with |y(t) − φ(t)| < (t) for all t. Lee A. Rubel provided an explicit example of such a polynomial DAE. Other exam...