We study persistence properties of solutions to some canonical dispersive
models, namely the semi-linear Schr\"odinger equation, the k-generalized
Korteweg-de Vries equation and the Benjamin-Ono equation, in weighted Sobolev
spaces Hs(Rn)∩L2(∣x∣ldx),s,l>0Comment: RIMS Kokyuroku Bessatsu (RIMS Proceedings, Extra Issue