Distance-regular Cayley graphs over (pseudo-) semi-dihedral groups.

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Bibliographic Details
Title: Distance-regular Cayley graphs over (pseudo-) semi-dihedral groups.
Authors: Huang, Xueyi1 (AUTHOR), Lu, Lu1,2 (AUTHOR), Zhan, Xiongfeng1 (AUTHOR)
Source: Discrete Applied Mathematics. Sep2025, Vol. 372, p95-108. 14p.
Subjects: Difference sets, Symmetry, Cayley graphs, Regular graphs
Abstract: Distance-regular graphs constitute an important class of regular graphs exhibiting remarkable combinatorial symmetry. In 2007, Miklavič and Potočnik initiated the systematic study of distance-regular Cayley graphs, extending the classical problem of characterizing strongly regular Cayley graphs (equivalent to investigating regular partial difference sets). In this paper, we provide a partial characterization of distance-regular Cayley graphs over semi-dihedral groups and pseudo-semi-dihedral groups, both of which are 2-groups that contain a cyclic subgroup of index 2. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Distance-regular graphs constitute an important class of regular graphs exhibiting remarkable combinatorial symmetry. In 2007, Miklavič and Potočnik initiated the systematic study of distance-regular Cayley graphs, extending the classical problem of characterizing strongly regular Cayley graphs (equivalent to investigating regular partial difference sets). In this paper, we provide a partial characterization of distance-regular Cayley graphs over semi-dihedral groups and pseudo-semi-dihedral groups, both of which are 2-groups that contain a cyclic subgroup of index 2. [ABSTRACT FROM AUTHOR]
ISSN:0166218X
DOI:10.1016/j.dam.2025.04.006