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arxiv: math/0702385 · v1 · submitted 2007-02-13 · 🧮 math.DG

On a class of twistorial maps

classification 🧮 math.DG
keywords geodesicmapsalmostclassnormaltotallytwistorialalong
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We show that a natural class of twistorial maps gives a pattern for apparently different geometric maps, such as, $(1,1)$-geodesic immersions from $(1,2)$-symplectic almost Hermitian manifolds and pseudo horizontally conformal submersions with totally geodesic fibres for which the associated almost CR-structure is integrable. Along the way, we construct for each constant curvature Riemannian manifold $(M,g)$, of dimension $m$, a family of twistor spaces $\bigl\{Z_r(M)\bigr\}_{1\leq r<\tfrac12m}$ such that $Z_r(M)$ parametrizes naturally the set of pairs $(P,J)$, where $P$ is a totally geodesic submanifold of $(M,g)$, of codimension $2r$, and $J$ is an orthogonal complex structure on the normal bundle of $P$ which is parallel with respect to the normal connection.

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