Cristian E. Gutierrez – författare

The purpose of this CIME summer school was to present current areas of research arising both in the theoretical and applied setting that involve fully nonlinear partial different equations. The equations presented in the school stem from the fields of Conformal Mapping Theory, Differential Geometry, Optics, and Geometric Theory of Several Complex Variables.

The school consisted of four courses: Extremal problems for quasiconformal mappings in space by Luca Capogna, Fully nonlinear equations in geometry by Pengfei Guan, Monge-Ampere type equations and geometric optics by Cristian E. Gutiérrez, and On the Levi Monge Ampere equation by Annamaria Montanari.

Now in its second edition, this monograph explores the Monge-Ampère equation and the latest advances in its study and applications.  It provides an essentially self-contained systematic exposition of the theory of weak solutions, including regularity results by L. A. Caffarelli.  The geometric aspects of this theory are stressed using techniques from harmonic analysis, such as covering lemmas and set decompositions.  An effort is made to present complete proofs of all theorems, and examples and exercises are offered to further illustrate important concepts.  Some of the topics considered include generalized solutions, non-divergence equations, cross sections, and convex solutions.  New to this edition is a chapter on the linearized Monge-Ampère equation and a chapter on interior Hölder estimates for second derivatives.  Bibliographic notes, updated and expanded from the first edition, are included at the end of every chapter for further reading on Monge-Ampère-type equations and their diverse applications in the areas of differential geometry, the calculus of variations, optimization problems, optimal mass transport, and geometric optics.  Both researchers and graduate students working on nonlinear differential equations and their applications will find this to be a useful and concise resource.