33 citations · 315 across the 87 of their papers we have counts for
4 papers · 1 filter
Picard numbers in a family of hyperkähler manifolds - A supplement to the article of R. Borcherds, L. Katzarkov, T. Pantev, N. I. Shepherd-Barron
Keiji Oguiso
We remark the density of the jumping loci of the Picard number of a hyperkähler manifold under small one-dimensional deformation and provide some applications for the Mordell-Weil…
The Simple Group of Order 168 and K3 Surfaces
Keiji Oguiso, De-Qi Zhang
The aim of this note is to characterize a K3 surface of Klein-Mukai type in terms of its symmetry.
Seshadri constant for a family of surfaces
Keiji Oguiso
The aim of this note is to study local and global Seshadri constants for a family of smooth surfaces with prescribed polarization. We shall first observe that given being small…
On the isotriviality of families of elliptic surfaces
Keiji Oguiso, Eckart Viehweg
We study non-isotrivial projective families of elliptic surfaces of Kodaira dimension one, over complex projective curves. If the base is an elliptic curve, we show that the family…