A remark on deformation of Gromov non-squeezing

Abstract: We prove that in dimension 4 the Gromov non-squeezing phenomenon is persistent with respect to $C ^{0}$ symplectic perturbations of the symplectic form on the range. This motivates an intriguing question on further deforming non-squeezing to general nearby forms. Our methods consist of a certain trap idea for holomorphic curves, analogous to traps in dynamical systems, and Hofer-Wysocki-Zehnder polyfold regularization in Gromov-Witten theory, especially as recently worked out in this present context by the team of Franziska Beckschulte, Ipsita Datta, Irene Seifert, Anna-Maria Vocke, and Katrin Wehrheim.