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Complex nilmanifolds and K\"ahler-like connections

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arxiv 1904.09707 v1 pith:6FAADTTK submitted 2019-04-22 math.DG

classification math.DG
keywords complexahler-likeconnectioninvariantleftmetricahleranalyze
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In this note, we analyze the question of when will a complex nilmanifold have K\"ahler-like Strominger (also known as Bismut), Chern, or Riemannian connection, in the sense that the curvature of the connection obeys all the symmetries of that of a K\"ahler metric. We give a classification in the first two cases and a partial description in the third case. It would be interesting to understand these questions for all Lie-Hermitian manifolds, namely, Lie groups equipped with a left invariant complex structure and a compatible left invariant metric.

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  1. On Strominger K\"ahler-like manifolds with degenerate torsion

    math.DG 2019-08 accept novelty 7.0 of 10

    Every complete non-Kähler SKL threefold has universal cover either a product of two Sasakian 3-manifolds or a non-Kähler SKL surface times a Kähler curve, and degenerate-torsion SKL manifolds split off a Kähler factor.

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