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Logarithmic Surfaces and Hyperbolicity

Gerd Dethloff, Steven S.-Y. Lu (2007)

Annales de l’institut Fourier

In 1981 J. Noguchi proved that in a logarithmic algebraic manifold, having logarithmic irregularity strictly bigger than its dimension, any entire curve is algebraically degenerate.In the present paper we are interested in the case of manifolds having logarithmic irregularity equal to its dimension. We restrict our attention to Brody curves, for which we resolve the problem completely in dimension 2: in a logarithmic surface with logarithmic irregularity 2 and logarithmic Kodaira dimension 2 , any...

Low pole order frames on vertical jets of the universal hypersurface

Joël Merker (2009)

Annales de l’institut Fourier

For low order jets, it is known how to construct meromorphic frames on the space of the so-called vertical k -jets J vert k ( 𝒳 ) of the universal hypersurface 𝒳 n + 1 × ( n + 1 + d ) ! ( ( n + 1 ) ! d ! ) - 1 parametrizing all projective hypersurfaces X n + 1 ( ) of degree d . In 2004, for k = n , Siu announced that there exist two constants c n 1 and c n 1 such that the twisted tangent bundle T J vert n ( 𝒳 ) 𝒪 n + 1 ( c n ) 𝒪 ( n + 1 + d ) ! ( ( n + 1 ) ! d ! ) - 1 ( c n ) is generated at every point by its global sections. In the present article, we establish this property outside a certain exceptional algebraic subset Σ J vert n ( 𝒳 ) defined by the vanishing of certain Wronskians,...

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