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pro vyhledávání: '"Nagai, Yasunari"'
Autor:
Nagai, Yasunari
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 degeneration given in [GHH] and the one given by the author in [N], are actua
Externí odkaz:
http://arxiv.org/abs/1709.01240
Autor:
Nagai, Yasunari
We explicitly construct a $V$-normal crossing Gorenstein canonical model of the relative symmetric products of a local semistable degeneration of surfaces without a triple point by means of toric geometry. Using this model, we calculate the stringy $
Externí odkaz:
http://arxiv.org/abs/1609.02306
Autor:
Nagai, Yasunari
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 relevant moduli space.
Comment: 25 pages
Comment: 25 pages
Externí odkaz:
http://arxiv.org/abs/1007.1546
Autor:
Nagai, Yasunari
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 corresponding Donaldson-Uhlenbeck compactification.
Comment: 23 pag
Comment: 23 pag
Externí odkaz:
http://arxiv.org/abs/1007.1544
Autor:
Nagai, Yasunari, Sato, Fumitoshi
Publikováno v:
J. Algebra 320 (2008) 3481-3492
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 isomorphic to the deformation functor of the Kodaira-Spencer algebra if the
Externí odkaz:
http://arxiv.org/abs/0811.0689
Autor:
Nagai, Yasunari
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 operator on the middle cohomology is at least the half of the dimension.<
Externí odkaz:
http://arxiv.org/abs/math/0605223
Autor:
Nagai, Yasunari
We give a characterization of irreducible symplectic fourfolds which are given as Hilbert scheme of points on a K3 surface.
Comment: 9 pages. To appear in manuscripta mathematica
Comment: 9 pages. To appear in manuscripta mathematica
Externí odkaz:
http://arxiv.org/abs/math/0210283
Akademický článek
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Autor:
Nagai, Yasunari
Publikováno v:
代数幾何学シンポジウム記録. 2017:27-34
於 城崎国際アートセンター(2017年10月24日-10月27日)
平成29年度科学研究費補助金 基盤研究(S)(課題番号25220701, 代表 向井 茂), 平成29年度科学研究費補助金 基盤研究(S)(課題番号17H06127, 代
平成29年度科学研究費補助金 基盤研究(S)(課題番号25220701, 代表 向井 茂), 平成29年度科学研究費補助金 基盤研究(S)(課題番号17H06127, 代
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=jairo_______::90e4d84e4221910e00398cdc2980eb91
http://hdl.handle.net/2433/229088
http://hdl.handle.net/2433/229088
Akademický článek
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