Liftable groups, negligible cohomology and Heisenberg representations

Abstract

We consider lifting of mod p representations to mod p^2 representations in the setting of representations of (i) finite groups; (ii) absolute Galois groups of abstract fields; and (iii) absolute Galois groups of local and global fields.

submitted for proceedings of the International Colloquium on Arithmetic Geometry held at TIFR, Mumbai in January 2020. In this version the results on liftable finite groups are improved due to a remark of Ali Cheraghi

References in corpus (1)

• Deformations of Galois representations and exceptional monodromy

Cited by in corpus (1)

• Smooth profinite groups, II: the Uplifting Pattern