The Modular Tree of Pythagorus

2000/10/28 by Roger C. Alperin, Alperin, Roger C.
Mathematics · #11D09 #20E08 #FOS: Mathematics #History and Overview (math.HO) #math.HO #msc:11D09 #msc:20E08

paper · pdf · doi:10.48550/arxiv.math/0010281

arxiv created 2000/10/28 · arxiv updated 2009/11/30

Abstract

The Pythagorean triples have the structure of a ternary rooted tree; the tree is based on the Cayley graph of a free subgroup of the modular group

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