On multiplicatively perfect numbers.
Two inequalities for means.
On the arithmetical functions and .
On the minimal number of singular fibres in a family of surfaces of general type.
The cone of curves of a K3 surface.
On the Schwab-Borchardt mean.
The construction of some means.
Holomorphic one-forms on varieties of general type
Are rational curves determined by tangent vectors?
Let be a projective variety which is covered by rational curves, for instance a Fano manifold over the complex numbers. In this paper, we give sufficient conditions which guarantee that every tangent vector at a general point of is contained in at most one rational curve of minimal degree. As an immediate application, we obtain irreducibility criteria for the space of minimal rational curves.
On the identric and logarithmic means.
A remark on the gamma function.
A Note on Inequalities of Diaz-matcalf Type for Isotonic Linear Functionals
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