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On the Recognition of Four-Directional Orthogonal Ray Graphs (2013)
Book Chapter
Felsner, S., Mertzios, G., & Mustata, I. (2013). On the Recognition of Four-Directional Orthogonal Ray Graphs. In K. Chatterjee, & J. Sgall (Eds.), Mathematical foundations of computer science 2013 : 38th international symposium, MFCS 2013, Klosterneuburg, Austria, August 26-30, 2013. Proceedings (373-384). Springer Verlag. https://doi.org/10.1007/978-3-642-40313-2_34

Orthogonal ray graphs are the intersection graphs of horizontal and vertical rays (i.e. half-lines) in the plane. If the rays can have any possible orientation (left/right/up/down) then the graph is a 4-directional orthogonal ray graph (4-DORG). Othe... Read More about On the Recognition of Four-Directional Orthogonal Ray Graphs.