Abstract
AbstractWe consider a conjecture that identifies two types of base point free divisors on $\overline {\text {M}}_{0,n}$
M
¯
0
,
n
. The first arises from Gromov-Witten theory of a Grassmannian. The second comes from first Chern classes of vector bundles associated with simple Lie algebras in type A. Here we reduce this conjecture on $\overline {\text {M}}_{0,n}$
M
¯
0
,
n
to the same statement for n = 4. A reinterpretation leads to a proof of the conjecture on $\overline {\text {M}}_{0,n}$
M
¯
0
,
n
for a large class, and we give sufficient conditions for the non-vanishing of these divisors.
Funder
national science foundation
simons foundation
hertz foundation
Publisher
Springer Science and Business Media LLC
Subject
Geometry and Topology,Algebra and Number Theory
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