Abstract
We use the Ricci flow on surfaces to give upper and lower estimates for the eigenvalues of the square of the Dirac operator of a surface (M, g) of negative Euler characteristic. For each of the eigenvalues, the estimate depends on simple geometric data of (M, g) and on the corresponding eigenvalue of the square of the Dirac operator of the unique constant curvature metric on the conformal class of g whose volume equals that of g.
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The author was partially supported by CNPq, Brazil, grant number 483844/2013-6.
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Girão, F. An eigenvalue comparison theorem for the Dirac operator on surfaces. Arch. Math. 107, 295–300 (2016). https://doi.org/10.1007/s00013-016-0947-6
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DOI: https://doi.org/10.1007/s00013-016-0947-6