Geodesic
A priori estimates and Fredholm criteria for a class of regular hypoelliptic operators
Matematičeskie trudy, Tome 25 (2022) no. 2, pp. 220-240

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We study the Fredholm property of regular hypoelliptic operators with special variable coefficients. In this paper, necessary and sufficient conditions are obtained for a priori estimates for differential operators acting in multianisotropic Sobolev spaces. Fredholm criteria are obtained for a wide class of regular hypoelliptic operators in multianisotropic weighted spaces in $\mathbb{R}^n$. 
@article{MT_2022_25_2_a9,
     author = {A. G. Tumanyan},
     title = {A priori estimates and {Fredholm} criteria for a class of regular hypoelliptic operators},
     journal = {Matemati\v{c}eskie trudy},
     pages = {220--240},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2022_25_2_a9/}
}
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A. G. Tumanyan. A priori estimates and Fredholm criteria for a class of regular hypoelliptic operators. Matematičeskie trudy, Tome 25 (2022) no. 2, pp. 220-240. http://geodesic.mathdoc.fr/item/MT_2022_25_2_a9/