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Abstract
Property
𝒪 for an arbitrary
complex, Fano manifold
X
is a statement about the eigenvalues of the linear operator obtained
from the quantum multiplication of the anticanonical class of
X . Conjecture
𝒪 is a conjecture
that property
𝒪
holds for any Fano variety. Pasquier classified the smooth nonhomogeneous
horospherical varieties of Picard rank 1 into five classes. Conjecture
𝒪
has already been shown to hold for the odd symplectic Grassmannians,
which is one of these classes. We will show that conjecture
𝒪
holds for two more classes and an example in a third class of Pasquier’s
list. Perron–Frobenius theory reduces our proofs to be graph-theoretic in
nature.
Keywords
quantum cohomology, horospherical, conjecture $\mathcal{O}$
Mathematical Subject Classification 2010
Primary: 14N35
Secondary: 14N15, 15B48
Milestones
Received: 10 July 2018
Revised: 12 July 2019
Accepted: 25 July 2020
Published: 20 November 2020
Communicated by Kenneth S. Berenhaut
© 2020 MSP (Mathematical Sciences
Publishers).