Some elementary Ramanujan graphs
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The published version is located at http://www.springerlink.com/content/u20164219h133851/
Abstract
We give elementary constructions of two infinite families of Ramanujan graphs of unbounded degree. The first uses the geometry of buildings over finite fields, and the second uses triangulations of modular curves.
Suggested Citation
PE Gunnells. "Some elementary Ramanujan graphs" Geometriae Dedicata 112.1 (2005): 51-63.
Available at: http://works.bepress.com/paul_gunnells/10
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