9 citations · 24 across the 8 of their papers we have counts for
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math.DG2003★ 3 cited
Curvature dependent lower bounds for the first eigenvalue of the Dirac operator
K. -D. Kirchberg
Using Weitzenböck techniques on any compact Riemannian spin manifold we derive inequalities that involve a real parameter and join the eigenvalues of the Dirac operator with curvat…
math.DG2003★ 9 cited
Some integrability conditions for almost Kähler manifolds
Klaus-Dieter Kirchberg
Among other results, a compact almost Kähler manifold is proved to be Kähler if the Ricci tensor is semi-negative and its length coincides with that of the star Ricci tensor or if…