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一类自伴微分算子谱的离散性
On the Discrete Spectrum of a Class of Differential Operators
【摘要】 本文研究了2n阶实系数Euler微分算式生成的对称微分算子,得到了自伴Euler微分算子的谱是离散的充分必要条件.
【Abstract】 In this paper, 2nth order symmetric differential expressions with real valued coefficients are considered. Some results concerning the discreteness of spectrum of associated operators are obtained. Especially, the necessary and sufficient conditions are given which ensure that the spectrum of differential operators is discrete.
【关键词】 Euler微分算子;
自伴微分算子;
离散谱;
本质谱;
【Key words】 Euler differential operator; Self-adjoint operator; Discrete spectrum; Essential spectrum?;
【Key words】 Euler differential operator; Self-adjoint operator; Discrete spectrum; Essential spectrum?;
【基金】 国家自然科学基金!(19871037);校基金
- 【文献出处】 数学学报 ,Acta Mathematica Sinica , 编辑部邮箱 ,2001年01期
- 【分类号】O177
- 【被引频次】29
- 【下载频次】110