Investigates the Fredholm property of hypoelliptic operators, indicating new insights into solvability criteria.
The Fredholm property of regular hypoelliptic operators with special variable coefficients is studied. For this class of operators, a priori estimates are obtained and a Fredholm criterion is established in multianisotropic weighted Sobolev spaces on the whole ⁿ .
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A. G. Tumanyan (2026) studied this question.
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