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math.GR2022
Frobenius Non-Stability of Nilpotent Groups
Forrest Glebe
A countable discrete group is said to be Frobenius stable if every function from the group to unitary matrices that is "almost multiplicative" in the Frobenius norm is "close" to a…
math.GR2022
A Constructive Proof that Many Groups with Non-Torsion 2-Cohomology are Not Matricially Stable
Forrest Glebe
A discrete group is matricially stable if every function from the group to a complex unitary group that is "almost multiplicative" in the point-operator norm topology is "close" to…