Unfolding of singularities and differential equations

2011/12/13 by B. G. Konopelchenko, Konopelchenko, Boris
Physics and Astronomy · Mathematics · #Nonlinear Waves and Solitons #Black Holes and Theoretical Physics #Numerical methods for differential equations

paper · pdf · doi:10.48550/arxiv.1112.2976

Abstract

Interrelation between Thom's catastrophes and differential equations revisited. It is shown that versal deformations of critical points for singularities of A,D,E type are described by the systems of Hamilton-Jacobi type equations. For particular nonversal unfoldings the corresponding equations are equivalent to the integrable two-component hydrodynamic type systems like classical shallow water equation and dispersionless Toda system and others. Pecularity of such integrable systems is that the generating functions for corresponding hierarchies, which obey Euler-Poisson-Darboux equation, contain information about normal forms of higher order and higher corank singularities.

Citations

• Waves and Thom's theorem

Related

• Stokes phenomenon and confluence in non-autonomous Hamiltonian systems
• On universality of critical behaviour in Hamiltonian PDEs
• On critical behaviour in systems of Hamiltonian partial differential equations
• Singularities of solutions of Hamilton-Jacobi equations
• Stable Singularity Formation for the Inviscid Primitive Equations