Primal graphs and primary graphs are defined and compared. All primary stars, paths, circuits, wheels, theta graphs, caterpillars, and echinoids are found, as are all primary graphs of the form \(K_{2,n}\) with \(n \leq 927\).
Citation
M.A. Seoud, D.R. Woodall. Primary Graphs[J], Ars Combinatoria, Volume 038. 299-308. .
