Kovalevskaya exponents and the space of initial conditions of a quasi-homogeneous vector field

Hayato Chiba

Research output: Contribution to journalArticle

5 Citations (Scopus)


Formal series solutions and the Kovalevskaya exponents of a quasi-homogeneous polynomial system of differential equations are studied by means of a weighted projective space and dynamical systems theory. A necessary and sufficient condition for the series solution to be a convergent Laurent series is given, which improves the well-known Painlevé test. In particular, if a given system has the Painlevé property, an algorithm to construct Okamoto's space of initial conditions is given. The space of initial conditions is obtained by weighted blow-ups of the weighted projective space, where the weights for the blow-ups are determined by the Kovalevskaya exponents. The results are applied to the first Painlevé hierarchy (2. m-th order first Painlevé equation).

Original languageEnglish
Pages (from-to)7681-7716
Number of pages36
JournalJournal of Differential Equations
Issue number12
Publication statusPublished - Dec 15 2015


All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics

Cite this