Maximal Hypoellipticity for Left-Invariant Differential Operators on Lie Groups
Journal of Lie Theory, Volume 29 (2019) no. 3, pp. 801-809
Given a maximal hypoelliptic differential operator of arbitrary order, we prove that its graph norm controls the Sobolev norm of the same order if the operator has left-invariant principal part and lower order terms with bounded coefficients. As an application, we obtain the essential self-adjointness on L2 of Rumin's Laplacians on the contact complex of the Heisenberg groups.
DOI: 10.5802/jolt.1079
Classification: 35H10, 35H20, 22E30
Keywords: Maximal hypoellipticity, Lie groups, Laplace operators
@article{JOLT_2019_29_3_a8,
     author = {T. Bruno},
     title = {Maximal {Hypoellipticity} for {Left-Invariant} {Differential} {Operators} on {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {801--809},
     year = {2019},
     volume = {29},
     number = {3},
     doi = {10.5802/jolt.1079},
     zbl = {1423.35085},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.1079/}
}
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T. Bruno. Maximal Hypoellipticity for Left-Invariant Differential Operators on Lie Groups. Journal of Lie Theory, Volume 29 (2019) no. 3, pp. 801-809. doi: 10.5802/jolt.1079

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