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math.GR2023
Characters of prime power degree in principal blocks
J. Miquel Martínez
We describe finite groups whose principal block contains only characters of prime power degree.
math.GR2021
Character degrees in blocks and defect groups
Eugenio Giannelli, J. Miquel Martínez, A. A. Schaeffer Fry
A recent question of Gabriel Navarro asks whether it is true that the derived length of a defect group is less than or equal to the number of degrees of irreducible characters in a…