wave amplitude and the wave gradient. This family contains all of the known breaking wave
equations, including the integrable ones: Camassa–Holm equation, Degasperis–Procesi
equation, Novikov equation, and FORQ/modified Camassa–Holm equation. One main result
is to show that all of the equations in the general family possess weak solutions given by
multi-peakons which are a linear superposition of peakons with time-dependent amplitudes …