Volume no :15, Issue no: 2, May (2016)

NOTE ON THE SINGULAR SOLUTIONS OF NONLINEAR ODES

Author's: Gabriel Thomas
Pages: [145] - [155]
Received Date: April 25, 2016
Submitted by:
DOI: http://dx.doi.org/10.18642/jpamaa_7100121661

Abstract

Let an ODE where F is analytic in The singular locus is the set We are interested in the algebraic conditions for singular solutions to happen.

First we deal with the analytic case: the graph of a singular solution is embedded in S. We recall that such a solution may occur only when the differential ideal generated by is not reducible. The existence of singular solutions is not generic and we show a relationship with the theory of differential-algebraic equations by Rabier and Rheinboldt [9]. This is also the adaptation to holomorphic differential equations of a result from Fukuda and Fukuda [2].

On the other hand, the Ritt-Raudenbusch theorems, related to the decomposition of differential ideals, give the algebraic conditions to get singular solutions for polynomial differential systems. This also indicates the non genericity of singular solutions existence.

Keywords

non-linear differential equations, singular solution, decomposition theorem.