On Fano manifolds with an unsplit dominating family of rational curves

Mathematics – Algebraic Geometry

Scientific paper

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11 pages. arXiv admin note: substantial text overlap with arXiv:0905.4388

Scientific paper

We study Fano manifolds $X$ admitting an unsplit dominating family of
rational curves and we prove that the Generalized Mukai Conjecture holds if $X$
has pseudoindex $i_X = (\dim X)/3$ or dimension $\dim X=6$. We also show that
this conjecture is true for all Fano manifolds with $i_X > (\dim X)/3$.

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