期刊
JOURNAL OF PSEUDO-DIFFERENTIAL OPERATORS AND APPLICATIONS
卷 4, 期 3, 页码 371-392出版社
SPRINGER BASEL AG
DOI: 10.1007/s11868-013-0071-3
关键词
Pseudo differential operator; Elliptic operator; Spectrum; Parametrix operator; Fredholm operator
This paper deals with minimal and maximal pseudo-differential operators. Moreover, it is given necessary and sufficient conditions for which these operators can be Fredholm. A description of their essential spectrum has been obtained for operators of non-zero order. Finally, it is shown that change variable preserve Fredholm property of pseudo-differential operators.
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