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| 摘要: |
| 本文研究了次对角占优的无界算子矩阵M=（CADB）的左本质谱和本质谱.利用分析方法和分块算子的性质，得到了整个算子矩阵的本质谱（左本质谱）与其内部元素的本质谱（左本质谱）之间的关系. |
| 关键词: 无界算子矩阵 Fredholm算子 左本质谱 本质谱 |
| DOI： |
| 分类号:O177.1 |
| 基金项目:国家自然科学基金（11371185；11461049）；内蒙古自然科学基金重大项目（2013ZD01）；内蒙古自然科学基金（2013JQ01；2015BS0105）；内蒙古工业大学自然科学基金（X201515）. |
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| THE ESSENTIAL SPECTRUM OF SOME UNBOUNDED BLOCK OPERATOR MATRICES |
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Narenchaogetu,QI Ya-ru,HUANG Jun-jie
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| Abstract: |
| In this paper, we consider the left essential spectrum and essential spectrum of off-diagonally dominant unbounded block operator matrices M=(CADB). By means of analysis method and basic properties of operator matrices, we obtain the relationship between the essential spectrum and essential spectrum of block operator matrices with their entries. |
| Key words: unbounded block operator matrix Fredholm operator left essential spectrum essential spectrum |
