THE FRIEDRICHS EXTENSION OF REGULAR ORDINARY DIFFERENTIAL-OPERATORS

被引：32
|
作者：
NIESSEN, HD [1 ]
ZETTL, A [1 ]
机构：
[1] NO ILLINOIS UNIV,DEPT MATH SCI,DE KALB,IL 60115
来源：
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS | 1990年 / 114卷
关键词：
D O I：
10.1017/S0308210500024409
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
For regular symmetric ordinary differential expressions we show that (i) the minimal operator is bounded below and (ii) the Friedrichs extension is determined by Dirichlet boundary conditions. Both proofs are based on elementary inequalities. © 1990, Royal Society of Edinburgh. All rights reserved.
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页码：229 / 236
页数：8
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