Remarks on level one conformal blocks divisors

Abstract

We show that conformal blocks divisors of type B_r and D_r at level one are effective sums of boundary divisors of $\bar{M}_{0,n}$. We also prove that the conformal blocks divisor of type $B_r$ at level 1 with weights (ω₁,…,ω₁) scales linearly with the level.