Hypertrees, projections, and moduli of stable rational curves
Hypertrees, projections, and moduli of stable rational curves
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DOI:
10.1515/crelle.2011.189
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发表时间:
2010-04
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通讯作者:
Ana-Maria Castravet;J. Tevelev
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文献类型:
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作者:
Ana-Maria Castravet;J. Tevelev
Abstract We give a conjectural description for the cone of effective divisors of the Grothendieck–Knudsen moduli space M̅0,n of stable rational curves with n marked points. Namely, we introduce new combinatorial structures called hypertrees and show that they give exceptional divisors on M̅0,n with many remarkable properties.