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math.CO2022
Unitals with many involutory translations
Theo Grundhöfer, Markus J. Stroppel, Hendrik Van Maldeghem
If every point of a unital is fixed by a non-trivial translation and at least one translation has order two then the unital is classical (i.e., hermitian).
math.CO2022
Finite subunitals of the Hermitian unitals
Theo Grundhöfer, Markus J. Stroppel, Hendrik Van Maldeghem
Every finite subunital of any generalized hermitian unital is itself a hermitian unital; the embedding is given by an embedding of quadratic field extensions. In particular, a gene…