PageHeader : Funkcialaj Ekvacioj, 38 (1995) 1-9 Title : The First Eigenvalues of Some Abstract Title : Elliptic Operators AuthorInfo : By AuthorInfo : Tomoyuki IDOGAWA and Mitsuharu OTANI AuthorInfo : (Waseda University, Japan) AuthorInfo : Dedicated to Professor Hiroki Tanabe on the occasion of his 60th birthday section : 1 Introduction section : 2 Main results section : 3 Proofs of theorems section : 4 Applications subsection : 4.1 The Eigenvalue problems subsection : 4.2 The uniqueness of positive solutions for sub-principal elliptic equations section : References