Conformally Osserman manifolds and self-duality in Riemannian geometry
@article{Blai2005ConformallyOM, title={Conformally Osserman manifolds and self-duality in Riemannian geometry}, author={Novica Bla{\vz}i{\'c} and Peter Gilkey}, journal={arXiv: Differential Geometry}, year={2005} }
We study the spectral geometry of the conformal Jacobi operator on a 4-dimensional Riemannian manifold (M,g). We show that (M,g) is conformally Osserman if and only if (M,g) is self-dual or anti self-dual. Equivalently, this means that the curvature tensor of (M,g) is given by a quaternionic structure, at least pointwise.
19 Citations
Conformally Osserman four-dimensional manifolds whose conformal Jacobi operators have complex eigenvalues
- MathematicsProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
- 2006
Conformal Osserman four-dimensional manifolds are studied with special attention to the construction of new examples showing that the algebraic structure of any such curvature tensor can be realized…
CURVATURE STRUCTURE OF SELF-DUAL 4-MANIFOLDS
- Mathematics
- 2008
We show the existence of a modified Cliff(1,1)-structure compatible with an Osserman 0-model of signature (2,2). We then apply this algebraic result to certain classes of pseudo-Riemannian manifolds…
Conformally Osserman manifolds of dimension 16 and a Weyl–Schouten theorem for rank-one symmetric spaces
- Mathematics
- 2012
A Riemannian manifold is called Osserman (conformally Osserman, respectively), if the eigenvalues of the Jacobi operator of its curvature tensor (Weyl tensor, respectively) are constant on the unit…
Osserman and Conformally Osserman Manifolds with Warped and Twisted Product Structure
- Mathematics
- 2008
Abstract.We characterize Osserman and conformally Osserman Riemannian manifolds with the local structure of a warped product. By means of this approach we analyze the twisted product structure and…
Weyl–Schouten Theorem for symmetric spaces
- Mathematics
- 2013
Let M0 be a symmetric space of dimension n > 5 whose de Rham decomposition contains no factors of constant curvature and let W0 be the Weyl tensor of M0 at some point. We prove that a Riemannian…
Complex Osserman Kähler manifolds in dimension four
- Mathematics
- 2013
Abstract. Let be a 4-dimensional almost-Hermitian manifold which satisfies the Kähler identity. We show that is complex Osserman if and only if has constant holomorphic sectional curvature. We also…
Complex Osserman Kaehler Manifolds
- Mathematics
- 2010
Let H be a 4 dimensional almost Hermitian manifold which satisfies the Kaehler identity. Then H is complex Osserman if and only if H has constant holomorphic sectional curvature. We also classify in…
Conformally Osserman manifolds of dimension 16 and a Weyl–Schouten theorem for rank-one symmetric spaces
- MathematicsAnnali di Matematica Pura ed Applicata
- 2011
A Riemannian manifold is called Osserman (conformally Osserman, respectively), if the eigenvalues of the Jacobi operator of its curvature tensor (Weyl tensor, respectively) are constant on the unit…
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Abstract.Let Mn be a Riemannian manifold and R its curvature tensor. For a point p ∈ Mn and a unit vector X ∈ TpMn, the Jacobi operator is defined by RX=R(X,·)X. The manifold Mn is called pointwise…