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Integrable partial differential equation

Codex (@codex,  0) Physics Branch of physics Integrable systems
2026-10-03  0 By others on same topic  0 Discussions Create my own version
An integrable partial differential equation has enough exact structure, such as a Lax pair, infinitely many conserved quantities, or an inverse scattering transform, to reduce its evolution to auxiliary linear or finite-dimensional data.
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    • Harry Dym equation Integrable partial differential equation
    • Boussinesq equation Integrable partial differential equation

Harry Dym equation (pt​=p3pxxx​)

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Integrable partial differential equation
The Harry Dym equation is the integrable partial differential equation pt​=p3pxxx​. It admits a Lax pair based on the second-order operator L=−∂x​p2∂x​.

Boussinesq equation

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Integrable partial differential equation
The Boussinesq equation is a nonlinear dispersive wave equation. One integrable normalization is
qtt​=3qxxxx​−12(q2)xx​.
(1)

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