مشخصات پژوهش

عنوان	Fredholmness property of M-elliptic pseudo-differential operator under change variable in its symbol
نوع پژوهش	مقاله چاپ‌شده
کلیدواژه‌ها	Pseudo differential operator · Elliptic operator · Spectrum · Parametrix operator · Fredholm operator
چکیده	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
پژوهشگران	مرتضی کوزه گر کالجی (نفر دوم)، محسن علیمحمدی (نفر اول)