There are no genuine Kähler-Codazzi manifolds
Abstract
Nearly Kähler- and Kähler-Codazzi-type manifolds are defined in a very similar way. We prove that nearly Kähler-type manifolds make sense only in Hermitian and para-Hermitian contexts, and that Kähler-Codazzi-type manifolds reduce to Kähler-type manifolds in all the four Hermitian, para-Hermitian, Norden and product Riemannian geometries. Kähler-Codazzi condition is also studied on almost complex golden manifolds.
- Publication:
-
International Journal of Geometric Methods in Modern Physics
- Pub Date:
- 2020
- DOI:
- arXiv:
- arXiv:1808.10216
- Bibcode:
- 2020IJGMM..1750044E
- Keywords:
-
- (J2 = ±1)-metric manifold;
- first canonical connection;
- Codazzi equation;
- nearly Kähler-type manifolds;
- Kähler–Codazzi-type manifolds;
- Mathematics - Differential Geometry;
- 53C15;
- 53C05;
- 53C07
- E-Print:
- Int. J. Geom. Meth. Mod. Phys. 17 no. 3 (2020), 2050044