3 citations · 5 across the 10 of their papers we have counts for
4 papers · 1 filter
On Orthogonal Graphs and their Automorphisms
Hans Cuypers
We provide a characterization of the connected subgraphs of the graphs with vertex set the non-isotropic points in a quadratic space , two points adjacent if and only if the…
Line graphs of Multi-Graphs and the forbidden graph
Hans Cuypers
The line graph of a multi-graph is the graph whose vertices are the edges of , where two such edges are adjacent if and only if they meet in a single vertex of . We p…
Whitney's Theorem for Line Graphs of Multi-Graphs
Hans Cuypers
Whitney's Theorem states that every graph, different from or , is uniquely determined by its line graph. A -line graph of a multi-graph is the graph with as verti…
The geometry of hyperbolic lines in polar spaces
Hans Cuypers
In this paper we consider partial linear spaces induced on the point set of a polar space, but with as lines the hyperbolic lines of this polar space. We give some geometric charac…