How do you teach Schrödinger’s equation to a 15 year old? This question was originally answered on Quora by Brian Bi.

To explore a prediction method for freak waves, a theoretical derivation is given to calculate the eigenvalue of the nonlinear Schrödinger (NLS) equation from measured wave height time history data ...

We consider the energy-critical semilinear focusing wave equation in dimension N = 3,4,5. An explicit solution W of this equation is known.