A non-boundary nef divisor on bar{M}_(0,12)
classification
🧮 math.AG
keywords
divisorboundarydescribedivisorseffectiveequivalentnon-boundarynumerically
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We describe a nef divisor $D_P$ on $\bar{M}_{0,12}$ that is not numerically equivalent to an effective sum of boundary divisors.
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