5 citations · 11 across the 7 of their papers we have counts for
7 papers
Gulbrandsen-Halle-Hulek degeneration and Hilbert-Chow morphism
Yasunari Nagai
For a semistable degeneration of surfaces without a triple point, we show that two models of degeneration of Hilbert scheme of points of the family, Gulbrandsen-Halle-Hulek degener…
Symmetric products of a semistable degeneration of surfaces
Yasunari Nagai
We explicitly construct a -normal crossing Gorenstein canonical model of the relative symmetric products of a local semistable degeneration of surfaces without a triple point by…
Birational geometry of O'Grady's six dimensional example over the Donaldson-Uhlenbeck compactification
Yasunari Nagai
We determine the birational geometry of O'Grady's six dimensional example over the Donaldson-Uhlenbeck compactification, by looking at the locus of non-locally-free sheaves on the…
Non-locally-free locus of O'Grady's ten dimensional example
Yasunari Nagai
We give a completely explicit description of the fibers of the natural birational morphism from O'Grady's ten dimensional singular moduli space of sheaves on a K3 surface to the co…
Deformation of a smooth Deligne-Mumford stack via differential graded Lie algebra
Yasunari Nagai, Fumitoshi Sato
For a smooth Deligne-Mumford stack over $\CC$, we define its associated Kodaira-Spencer differential graded Lie algebra and show that the deformation functor of the stack is isomor…
On monodromies of a degeneration of irreducible symplectic Kähler manifolds
Yasunari Nagai
We study the monodromy operators on the betti cohomologies associated to a good degeneration of irreducible symplectic manifold and we show that the unipotency of the monodromy ope…