{ "id": "1712.07239", "version": "v1", "published": "2017-12-19T22:11:12.000Z", "updated": "2017-12-19T22:11:12.000Z", "title": "Critical points of Strichartz functional", "authors": [ "C. Eugene Wayne", "Vadim Zharnitsky" ], "comment": "36 pages, 6 figures", "categories": [ "math-ph", "math.MP" ], "abstract": "We study a pair of infinite dimensional dynamical systems naturally associated with the study of minimizing/maximizing functions for the Strichartz inequalities for the Schr\\\"odinger equation. One system is of gradient type and the other one is a Hamiltonian system. For both systems, the corresponding sets of critical points, their stability, and the relation between the two are investigated. By a combination of numerical and analytical methods we argue that the Gaussian is a maximizer in a class of Strichartz inequalities for dimensions one, two and three. The argument reduces to verification of an apparently new combinatorial inequality involving binomial coefficients.", "revisions": [ { "version": "v1", "updated": "2017-12-19T22:11:12.000Z" } ], "analyses": { "keywords": [ "critical points", "strichartz functional", "strichartz inequalities", "infinite dimensional dynamical systems", "gradient type" ], "note": { "typesetting": "TeX", "pages": 36, "language": "en", "license": "arXiv", "status": "editable" } } }