4.5 Article

Symmetry gaps for higher order ordinary differential equations

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmaa.2022.126475

关键词

Submaximal symmetry for ODE; Symmetry gap problem; Cartan geometry

资金

  1. Norwegian Financial Mechanism 2014-2021 [2019/34/H/ST1/00636]
  2. Tromso Research Foundation (project Pure Mathematics in Norway)

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This article presents the maximal contact symmetry dimensions for scalar ODEs and vector ODEs, along with the determination of submaximal symmetry dimensions using a Cartan-geometric approach. It also provides a classification of finer curvature-constrained submaximal symmetry dimensions.
The maximal contact symmetry dimensions for scalar ODEs of order >= 4 and vector ODEs of order >= 3 are well known. Using a Cartan-geometric approach, we determine for these ODEs the next largest realizable (submaximal) symmetry dimension. Moreover, finer curvature-constrained submaximal symmetry dimensions are also classified. (c) 2022 The Author(s). Published by Elsevier Inc.

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