Brief Communications

Gale duality and the cone of numerically effective divisors on spherical varieties

V. S. Zhgoon<sup>abc

a</sup> Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region
^b National Research University Higher School of Economics, Moscow
^c Scientific Research Institute for System Analysis of the National Research Centre "Kurchatov Institute", Moscow

Abstract: We describe the Picard group and the cone of numerically divisors in the context of Gale duality.

Keywords: Gale duality, spherical varieties, Picard group, cone of numerically effective divisors (Nef-cone).

Received: 27.07.2025
Revised: 04.08.2025

DOI: 10.4213/mzm14824