Let U be the universal family over M=M0,n, let ωU/M be the relative dualizing sheaf, and let σi: M →U be the sections defining the marked points. The divisors ψi are defined by ψi := σi*(ωU/M). We define the class Ψ by Ψ= ψ1 + ... + ψn.
i1 : psiDivisorM0nbar(14) 24 o1 = SymmetricDivisorM0nbar{2 => -- } 13 33 3 => -- 13 40 4 => -- 13 45 5 => -- 13 48 6 => -- 13 49 7 => -- 13 NumberOfPoints => 14 o1 : SymmetricDivisorM0nbar |