Inverse Scattering problem: theory, Differential equation, Schroedinger KdV KP problem, Radar, Acoustic location, Geophysical

Three Body Scattering Problem

Riemann Problem: Conservation Law, Piecewise, Discontinuity, Hyperbolic Partial Differential Equation,Euler Equations

Ansatz: Noun, Word problem (mathematics education), Parameter, Cluster analysis, Differential equation, Least...

Hard Problem of Consciousness: Theory