publications by David Needham.

Papers Published

1. Needham, D.J. and McAllister, S., Centre families in two-dimensional complex holomorphic dynamical systems, Proc. R. Soc. Lond. A, Math. Phys. Eng. Sci. (UK), vol. 454 no. 1976 (1998), pp. 2267 - 78 [0258] .
   (last updated on 2007/04/06)

   Abstract:
   We consider a two-dimensional complex holomorphic dynamical system. In particular, we use the singular point theory of C.H. Briot and J.C. Bouquet to establish the existence of complex holomorphic invariant manifolds of the system in the neighbourhood of an equilibrium point with two purely imaginary eigenvalues. Consequently, this enables us to establish the existence of isochronous centre families in the neighbourhood of the equilibrium point. The results are exhibited by application to the complex Takens-Bogdanov system

   Keywords:
   eigenvalues and eigenfunctions;nonlinear dynamical systems;