Let Pic(M0,n)RSn denote the vector space of Sn-invariant divisors with coefficients in a ring R. Here, given an Sn symmetric R-divisor D on M0,n and a number c, the function returns cD.
i1 : D=symmetricDivisorM0nbar(6,{2,3}) o1 = SymmetricDivisorM0nbar{2 => 2 } 3 => 3 NumberOfPoints => 6 o1 : SymmetricDivisorM0nbar |
i2 : 6*D o2 = SymmetricDivisorM0nbar{2 => 12 } 3 => 18 NumberOfPoints => 6 o2 : SymmetricDivisorM0nbar |