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Focal Systems for Pfaffian Systems with Characteristics

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Part of the book series: Abel Symposia ((ABEL,volume 5))

Abstract

Focal systems are a generalization to the case of Pfaffian system with characteristics of the classical notion of focal curves for first-order scalar partial diffeerntial equations. We show how focal systems can be used to prove local normal form results for second-order scalar hyperbolic equations in the plane. We also illustrate their use in integration methods for first-order equations.

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Correspondence to Niky Kamran .

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Kamran, N. (2009). Focal Systems for Pfaffian Systems with Characteristics. In: Kruglikov, B., Lychagin, V., Straume, E. (eds) Differential Equations - Geometry, Symmetries and Integrability. Abel Symposia, vol 5. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00873-3_8

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