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On Kähler-like almost Hermitian metrics and the almost Hermitian curvature flow
- Source :
- Hokkaido Math. J. 49, no. 3 (2020), 431-450
- Publication Year :
- 2020
- Publisher :
- Department of Mathematics, Hokkaido University, 2020.
-
Abstract
- We introduce a Kähler-like almost Hermitian metric and an almost balanced metric. We prove that on a Kähler-like almost Hermitian manifold, we have an identity between the first derivative of the torsion $(1,0)$-tensor and the Nijenhuis tensor. By applying the identity, then we figure out what the equivalent condition of being almost balanced on a compact Kähler-like almost Hermitian manifold is. We apply the result to a 2-step nilpotent Lie algebra, and also to the almost Hermitian curvature flow (AHCF). We obtain a lower bound for the scalar curvature along (AHCF). Also we have some results on the monotonicity of the volume along (AHCF) by studying the relation between the volume and the scalar curvature.
- Subjects :
- Pure mathematics
Kähler-like metrics
Chern connection
General Mathematics
Curvature
53C55
Hermitian matrix
almost Hermitian manifolds
Nilpotent Lie algebra
53C15
Flow (mathematics)
32Q60
Torsion (algebra)
Hermitian manifold
Mathematics::Differential Geometry
Tensor
Mathematics::Symplectic Geometry
Scalar curvature
Mathematics
Subjects
Details
- ISSN :
- 03854035
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Hokkaido Mathematical Journal
- Accession number :
- edsair.doi.dedup.....1020cfe7e8a48b106bd29c8117e2d295
- Full Text :
- https://doi.org/10.14492/hokmj/1607936536