The Dry Ten Martini Problem for $C^2$ cosine-type quasiperiodic Schrödinger operators

Lingrui Ge, Yiqian Wang, Jiahao Xu

This paper solves ``The Dry Ten Martini Problem'' for $C^2$ cosine-type quasiperiodic Schrödinger operators with large coupling constants and Diophantine frequencies, a model orig…