2008/09/25 by H. Lee Price, Price, H. Lee · 2 citations
Mathematics · #History and Theory of Mathematics #Mathematical and Theoretical Analysis #Mathematics and Applications #math.HO #math.NT #msc:05B07 #msc:05C50 #msc:11-99 #msc:11B39 #msc:11D68
paper · pdf · doi:10.48550/arxiv.0809.4324
14 pages,6 figures, LaTeX *Note (10/24/2011): The classic tree described by Barning, Hall, and others may have been first discovered by B. Berggren in 1934. See: B. Berggren,(1934). "Pytagoreiska trianglar" (in Swedish). Tidskrift for elementar matematik, fysik och kemi 17: 129-139
arxiv created 2011/10/24 · arxiv updated 2012/02/09
In 1967 the Dutch mathemetician F.J.M. Barning described an infinite, planar, ternary tree*. Seven years later, A. Hall independently discovered the same tree. Both used the method of uni-modular matrices to transform one triple to another. A number of rediscoveries have occurred more recently. In this article we announce the discovery of an entirely different ternary tree, and show how it relates to the one found by Barning and Hall.