Subharmonic solutions of a nonconvex noncoercive Hamiltonian system
In this paper we study the existence of subharmonic solutions of the Hamiltonian system where u is a linear map, G is a C1-function and e is a continuous function.
Subharmonics near an equilibrium point for Hamiltonian systems.
Subnormal solutions of second-order nonhomogeneous linear differential equations with periodic coefficients.
Substitution method for generalized linear differential equations
The generalized linear differential equation where and the matrices are regular, can be transformed using the notion of a logarithimc prolongation along an increasing function. This method enables to derive various results about generalized LDE from the well-known properties of ordinary LDE. As an example, the variational stability of the generalized LDE is investigated.
Subthreshold domain of bistable equilibria for a model of HIV epidemiology.
Successive approximation method for investigating three point boundary value problem with singular matrices.
Successive Approximation of Neutral Functional Stochastic Differential Equations in Hilbert Spaces
By using successive approximation, we prove existence and uniqueness result for a class of neutral functional stochastic differential equations in Hilbert spaces with non-Lipschitzian coefficients
Successive iteration and positive solutions for nonlinear -point boundary value problems on time scales.
Sufficient and necessary condition for the permanence of periodic predator-prey system.
Sufficient and necessary conditions for oscillation of th-order differential equation with retarded argument.
Sufficient condition for existence of solutions for higher-order resonance boundary value problem with one-dimensional p-Laplacian.
Sufficient conditions for functions to form Riesz bases in and applications to nonlinear boundary-value problems.
Sufficient conditions for nonoscillation of neutral equations
Sufficient conditions for oscillation and nonoscillation of the solutions of operator-differential equations with piecewise constant argument
Effective sufficient conditions for oscillation and nonoscillation of solutions of some operator-differential equations with piecewise constant argument are found.
Sufficient conditions for oscillations of all solutions of a class of impulsive differential equations with deviating argument.
Sufficient conditions for oscillatory behaviour of a first order neutral difference equation with oscillating coefficients.
Sufficient conditions for the existence of a center in polynomial systems of arbitrary degree.
In this paper, we consider polynomial systems of the form x' = y + P(x, y), y' = -x + Q(x, y), where P and Q are polynomials of degree n wihout linear part.For the case n = 3, we have found new sufficient conditions for a center at the origin, by proposing a first integral linear in certain coefficient of the system. The resulting first integral is in the general case of Darboux type.By induction, we have been able to generalize these results for polynomial systems of arbitrary degree.
Sufficient conditions for the oscillation of -th order nonlinear delay differential equation
Sufficient conditions for the oscillation of solutions to nonlinear second-order differential equations.
Sufficient conditions for the oscillation of the solutions to a class of impulsive differential equations with advanced argument.