title: A pointwise estimate for fractionary derivatives with applications to partial differential equations.
abstract: This article emphasizes the role played by a remarkable pointwise inequality satisfied by fractionary derivatives in order to obtain maximum principles and Lp-decay of solutions of several interesting partial differential equations. In particular, there are applications to quasigeostrophic flows, in two space variables with critical viscosity, that model the Eckman pumping [see Baroud, Ch. N., Plapp, B. B., She, Z. S. & Swinney, H. L. (2002) Phys. Rev. Lett. 88, 114501 and Constantin, P. (2002) Phys. Rev. Lett. 89, 184501].
authors.affiliation: Universidad Autónoma de Madrid, Carretera de Colmenar Viejo, Km. 15, 28049 Madrid, Spain. antonio.cordoba@uam.es
authors.forename: Antonio
authors.initials: A
authors.lastname: Cordoba
authors.forename: Diego
authors.initials: D
authors.lastname: Cordoba
mesh_terms: D008962:Models, Theoretical; D012996:Solutions; D014783:Viscosity
chemical_list: D012996:Solutions