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math.RT2019★ 16 cited
Galois action on the principal block and cyclic Sylow subgroups
Noelia Rizo, A. A. Schaeffer Fry, Carolina Vallejo
We characterize finite groups having a cyclic Sylow p-subgroup in terms of the action of a specific Galois automorphism on the principal p-block for p=2,3. We show that the analog…
math.GR2019
Groups with few -character degrees
Eugenio Giannelli, Noelia Rizo, Mandi Schaeffer Fry
We prove a variation of Thompson's Theorem. Namely, if the first column of the character table of a finite group contains only two distinct values not divisible by a given prim…