Notes concerning Codazzi pairs on almost anti-Hermitian manifolds

TL;DR

This paper explores conjugate connections, Codazzi pairs, and statistical structures on almost anti-Hermitian manifolds, establishing relations among curvature tensors and conditions for anti-Kähler structures.

Contribution

It introduces conjugate connections relative to key metrics, characterizes Codazzi pairs, and links these to anti-Kähler structures on almost anti-Hermitian manifolds.

Findings

Relations among curvature tensors of conjugate connections

Conjugation operations form a Klein group

Conditions for an almost anti-Hermitian manifold to be anti-Kähler

Abstract

Let $\nabla $ be a linear connection on an $2n$-dimensional almost anti-Hermitian manifold $M$\ equipped with an almost complex structure $J$, a pseudo-Riemannian metric $g$ and the twin metric $G=g\circ J$. In this paper, we first introduce three types of conjugate connections of linear connections relative to $g$, $G$ and $J$. We obtain a simple relation among curvature tensors of these conjugate connections. To clarify relations of these conjugate connections, we prove a result stating that conjugations along with an identity operation together act as a Klein group. Secondly, we give some results exhibiting occurrences of Codazzi pairs which generalize parallelism relative to $\nabla $. Under the assumption that $(\nabla ,J)$ being a Codazzi pair, \ we derive a necessary and sufficient condition the almost anti-Hermitian manifold $(M,J,g,G)$ is an anti-K\"{a}hler relative to a torsion-free linear connection $\nabla $. Finally, we investigate statistical structures on $M$ under $\nabla $ ($\nabla $ is a $J-$invariant torsion-free connection).