On a stratification of the Kontsevich moduli space M¯0,n(G(2,4),d) and enumerative geometry
On a stratification of the Kontsevich moduli space M¯0,n(G(2,4),d) and enumerative geometry
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关于 Kontsevich 模空间 M¯0,n(G(2,4),d) 的分层和枚举几何
DOI:
10.1016/j.jpaa.2008.10.009
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发表时间:
2009
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通讯作者:
Cristina Martínez Ramírez
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作者:
Cristina Martínez Ramírez
We consider a particular stratification of the moduli space M¯0,n(G(2,4),d) of stable maps to G(2,4). As an application we compute the degree of the variety parametrizing rational ruled surfaces with a minimal directrix of degree d2−1 by studying divisors in this moduli space of stable maps. For example, there are 128054031872040 rational ruled sextics passing through 25 points in P3with a minimal directrix of degree 2.