Carmen Amarra

activity

20162026

most citedThe girth, odd girth, distance function, and diameter of generalized Johnson graphs

21 citations · 22 across the 9 of their papers we have counts for

collaborators

Showing 2023Show all

2 papers · 1 filter

math.CO2023★ 21 cited

The girth, odd girth, distance function, and diameter of generalized Johnson graphs

John S. Caughman, Ari J. Herman, Taiyo S. Terada

For any non-negative integers $v > k > i$ , the {\em generalized Johnson graph}, $J (v, k, i)$ , is the undirected simple graph whose vertices are the $k$ -subsets of a $v$ -set, and wher…

math.CO2023

Block-transitive 2-designs with a chain of imprimitive partitions

Carmen Amarra, Alice Devillers, Cheryl E. Praeger

More than $30$ years ago, Delandtsheer and Doyen showed that the automorphism group of a block-transitive $2$ -design, with blocks of size $k$ , could leave invariant a nontrivial po…