block designs 1design theory 1graph girth 1signed graphs 1strongly regular graphs 1weighing matrices 1
From the 1 of 2 linked papers with an AI index.
2 papers
math.CO2026
On strongly regular signed graphs of higher girth
Quaid Iqbal, Thomas Zaslavsky
The paper classifies strongly regular signed graphs with girth 4 that are bipartite using weighing matrix designs and symmetric block designs, notes that girth‑5 cases are few, and…
math.CO2024
Projective Rectangles: A New Kind of Incidence Structure
Rigoberto Florez, Thomas Zaslavsky
A projective rectangle is like a projective plane that has different lengths in two directions. We develop the basic theory of projective rectangles including incidence properties,…