1,275 research outputs found
Nontrivial solutions of boundary value problems for second order functional differential equations
In this paper we present a theory for the existence of multiple nontrivial
solutions for a class of perturbed Hammerstein integral equations. Our
methodology, rather than to work directly in cones, is to utilize the theory of
fixed point index on affine cones. This approach is fairly general and covers a
class of nonlocal boundary value problems for functional differential
equations. Some examples are given in order to illustrate our theoretical
results.Comment: 19 pages, revised versio
Periodic perturbations of constrained motion problems on a class of implicitly defined manifolds
We study forced oscillations on differentiable manifolds which are globally
defined as the zero set of appropriate smooth maps in some Euclidean spaces.
Given a T-periodic perturbative forcing field, we consider the two different
scenarios of a nontrivial unperturbed force field and of perturbation of the
zero field. We provide simple, degree-theoretic conditions for the existence of
branches of T-periodic solutions. We apply our construction to a class of
second order Differential-Algebraic Equations.Comment: 15 pages, 2 figures, to appear in Communications in Contemporary
Mathematics. arXiv admin note: substantial text overlap with arXiv:1102.156
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