The Second Dirac Eigenvalue of a Nearly Parallel G2-manifold
نویسنده
چکیده
is the smallest eigenvalues of the square of the Riemannian Dirac operator D, see [6]. The question whether or not one can estimate the next eigenvalue μ2(D ) has not yet been investigated for Dirac operators. Remark that in case of the Laplacian acting on functions of an Einstein spaceM 6= S, there are lower estimates for small eigenvalues depending on the minimum of the sectional curvature, see [18], [19].
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تاریخ انتشار 2011