PageHeader : Funkcialaj Ekvacioj, 18 (1975) 245-256 Title : Minimal Singular Sets for Linear Differential Title : Operators with Constant Coefficients AuthorInfo : By Haruki YAMADA AuthorInfo : (Tokyo Institute of Technology, Japan) section : 1. Introduction section : 2. Preliminaries section : 3. Some Properties of Minimal Singular Sets section : 4. Some Necessary Conditions and Sufficient Conditions section : References