Normal forms of linear second order partial differential equations on the plane

作     者：Alexey Davydov 

作者机构：Department of Mathematics The National University of Science and Technology MISiS Moscow 119049 Russia Department of Theory of Dynamical Systems Lomonosov Moscow State University Moscow 119991 Russia International Institute for Applied Systems Analysis Laxenburg A-2361 Austria 

出 版 物：《Science China Mathematics》 (中国科学：数学（英文版）)

年 卷 期：2018年第61卷第11期

页      面：1947-1962页

核心收录：

学科分类：07[理学] 070104[理学-应用数学] 0701[理学-数学] 

基　　金：supported by the Ministry of Education and Science of the Russian Federation (Grant No. 1.638.2016/FPM) Open access funding provided by International Institute for Applied Systems Analysis (IIASA) 

主　　题：normal form mixed type partial differential equation main symbol 

摘      要：The paper is devoted to the theory of normal forms of main symbols for linear second order partial differential equations on the *** discuss the results obtained in the last decades and some problems,which are important both for the development of this theory and the *** reduction theorem,which was used to obtain many of recent results in the theory,is included in the paper in the parametric form together with *** is a feeling that the theorem still has potential to get progress in the solution of open problems in the theory.