Bernard Dacorogna 教授：Darboux theorem, symplectic factorization and ellipticity

Chern Institute of Mathematics, Nankai University, Tianjin,China. 300071
Tel: 86-22-2350-8228、86-22-2350-1029, Fax: 86-22-2350-8114, Email:cim@nankai.edu.cn