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Multi-shockpeakons for the stochastic Degasperis-Procesi equation
Electronic Research Archive 2022, 30(6): 2303-2320
Published: 15 June 2022
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The deterministic Degasperis-Procesi equation admits weak multi-shockpeakon solutions of the form

u(x,t)=i=1nmi(t)e|xxi(t)|i=1nsi(t)sgn(xxi(t))e|xxi(t)|,

where sgn(x) denotes the signum function with sgn(0)=0, if and only if the time-dependent parameters xi(t) (positions), mi(t) (momenta) and si(t) (shock strengths) satisfy a system of 3n ordinary differential equations. We prove that a stochastic perturbation of the Degasperis-Procesi equation also has weak multi-shockpeakon solutions if and only if the positions, momenta and shock strengths obey a system of 3n stochastic differential equations.

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