Rigorous numerics of blow-up solutions for ODEs with exponential nonlinearity

Kaname Matsue, Akitoshi Takayasu

Research output: Contribution to journalArticlepeer-review

Abstract

Our concerns here are blow-up solutions for ODEs with exponential nonlinearity from the viewpoint of dynamical systems and their numerical validations. As an example, the finite difference discretization of ut=uxx+eum with the homogeneous Dirichlet boundary condition is considered. Our idea is based on compactification of phase spaces and time-scale desingularization as in previous works. In the present case, treatment of exponential nonlinearity is the main issue. Fortunately, under a kind of exponential homogeneity of vector field, we can treat the problem in the same way as polynomial vector fields. In particular, we can characterize and validate blow-up solutions with their blow-up times for differential equations with such exponential nonlinearity in the similar way to previous works. A series of technical treatments of exponential nonlinearity in blow-up problems is also shown with concrete validation examples.

Original languageEnglish
Article number112607
JournalJournal of Computational and Applied Mathematics
Volume374
DOIs
Publication statusPublished - Aug 15 2020

All Science Journal Classification (ASJC) codes

  • Computational Mathematics
  • Applied Mathematics

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