Four-dimensional gradient Ricci solitons with (half) nonnegative
isotropic curvature
Four-dimensional gradient Ricci solitons with (half) nonnegative
isotropic curvature
This is a sequel to our paper [24], in which we investigated the geometry of 4-dimensional gradient shrinking Ricci solitons with half positive (nonnegative) isotropic curvature. In this paper, we mainly focus on 4-dimensional gradient steady Ricci solitons with nonnegative isotropic curvature (WPIC) or half nonnegative isotropic curvature (half WPIC). …