3 papers
math.AG2026
Non-projective complete log canonical surfaces
Osamu Fujino, Nao Moriyama, Hiroshi Sato
We construct non-projective complete log canonical algebraic surfaces whose canonical divisors are semi-ample over an algebraically closed field of any characteristic other than th…
math.AG2026
A characterization of projective space via lengths of extremal rays
Osamu Fujino, Eric Jovinelly, Brian Lehmann +1
We prove a new characterization of complex projective space using lengths of extremal rays.
math.AG2025
On finiteness of relative log pluricanonical representations
Osamu Fujino
We prove the finiteness of relative log pluricanonical representations in the complex analytic setting. As an application, we discuss the abundance conjecture for semi-log canonica…