Sofia Brenner

collaborators

4 papers

math.CO2026

Symmetry classes of Hamiltonian cycles

Julia Baligacs, Sofia Brenner, Annette Lutz +1

We initiate the study of Hamiltonian cycles up to symmetries of the underlying graph. Our focus lies on the extremal case of Hamiltonian-transitive graphs, i.e., Hamiltonian graphs…

cs.DS2026

Constant delay Gray code enumeration of ideals and antichains in posets

Sofia Brenner, JiÅÃ Fink

We present an algorithm that enumerates all ideals of an input poset with constant delay in Gray code order, i.e., such that consecutively visited ideals differ in at most three el…

math.GR2025

Irredundant bases for soluble groups

Sofia Brenner, Coen del Valle, Colva M. Roney-Dougal

Let $I^$ be a finite set and $G$ be a subgroup of $Sym (I^)$ . An irredundant base for $G$ is a sequence of points of $I^$ yielding a strictly descending chain of poin…

math.GR2025

Semi-extraspecial $p$ -groups with automorphisms of large order

Sofia Brenner, Rachel D. Camina, Mark L. Lewis

In this paper, we consider semi-extraspecial $p$ -groups $G$ that have an automorphism of order $∣ G : G^{'} ∣ - 1$ . We prove that these groups are isomorphic to Sylow $p$ -subgroups of ${\…

Symmetry classes of Hamiltonian cycles

Constant delay Gray code enumeration of ideals and antichains in posets

Irredundant bases for soluble groups

Semi-extraspecial p-groups with automorphisms of large order

Semi-extraspecial $p$ -groups with automorphisms of large order