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$$\pi /2$$-angle Xao graphs are spanners. (English) Zbl 1251.05036

##### MSC:
 05C10 Planar graphs; geometric and topological aspects of graph theory 05C12 Distance in graphs 05C38 Paths and cycles
##### Keywords:
Yao graph; Y4; spanner
Full Text:
##### References:
 [1] DOI: 10.1016/j.comgeo.2004.04.003 · Zbl 1082.65015 · doi:10.1016/j.comgeo.2004.04.003 [2] Green J. W., Portugaliae Math. 10 pp 121– [3] DOI: 10.1137/0211059 · Zbl 0492.68050 · doi:10.1137/0211059
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