The Ernst equation
The equation reads:
For its Lax pair and other features see e.g. , and references therein.
- Weisstein, Eric W, Ernst equation, MathWorld--A Wolfram Web.
- Biography of Frederick J. Ernst
- Harrison B.K. (1978), Backlund transformation for the Ernst equation of general relativity, Phys. Rev. Lett. 41, no. 18, 1197--1200.
- Marvan M. (2004), Recursion operators for vacuum Einstein equations with symmetries, in: Symmetry in nonlinear mathematical physics, Kyiv.arXiv:nlin/0401014