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Keywords:
G-structure; quaternion-Hermitian manifold; nearly-quaternionic Kähler; semi-quaternionic Kähler; fundamental four-form
G-structure; quaternion-Hermitian manifold; nearly-quaternionic Kähler; semi-quaternionic Kähler; fundamental four-form
Summary:
Nearly-quaternionic Kähler manifolds of dimension at least $8$ are shown to be quaternionic Kähler. Restrictions on the covariant derivative of the fundamental four-form of a semi-quaternionic Kähler are also found.
References:
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