On the radius of spatial analyticity for defocusing nonlinear Schrödinger equations

Lower bounds on the radius of spatial analyticity for the Kawahara equation

“…Our aim in this paper is to obtain the spatial analyticity for this equation which is a fifth-order KdV type equation, motivated by earlier works for the KdV equation mentioned above and a recent one for the quartic generalized KdV equation by Selberg and Tesfahun [19]. We also mention some references for other dispersive equations like Schrödinger equations [5,22,1], Klein-Gordon equations [15], and Dirac-Klein-Gordon equations [18,16].…”