SEMIAMPLENESS CRITERIA FOR DIVISORS ON M0,n

Abstract

We develop new characteristic-independent combinatorial criteria for semiampleness of divisors on M0,n. As an application, we associate to a cyclic rational quadratic form satisfying a certain balancedness condition an infinite sequence of semiample line bundles. We also give several sufficient and effective conditions for an Sn-symmetric divisor on M0,n to… (More)

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