This work demonstrates bounds on eigenvalues in cylinders using baouendi–grushin operators, highlighting spectral inequalities.
The aim of this paper is to consider spectral inequalities of a class of Baouendi–Grushin type operators in cylinders. Such operators are hypoelliptic and we obtain non‐Weyl type inequalities depending on the rate of the degeneracy. We also give an example where all eigenvalues and eigenfunctions are computed explicitly.
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Aljahili et al. (2025) studied this question.
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