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Submanifolds of real codimension of a complex projective space

Masafumi Okumura — 1975

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Allo scopo di studiare una sottovarietà reale M di uno spazio proiettivo complesso, si costruisce il sistema di cerchi su M compatibile colla fibrazione di Hopf e che può venire considerato come una sottovarietà di una sfera di dimensione dispari. Così, valendosi della teoria della sommersione, condizioni imposte alla M vengono a tradursi in altre relative ad una sottovarietà di una sfera; e vari esempi al riguardo vengono approfonditi.

CR submanifolds of maximal CR dimension in complex manifolds

Mirjana DjorićMasafumi Okumura — 2002

Banach Center Publications

The aim of this paper is to investigate n-dimensional real submanifolds of complex manifolds in the case when the maximal holomorphic tangent space is (n-1)-dimensional. In particular, we give some examples and we consider the Levi form on these submanifolds, especially when the ambient space is a complex space form. Moreover, we show that on some remarkable class of real hypersurfaces of complex space forms, the Levi form cannot vanish identically.

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