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A Disquisition on the Square Root of Three - Continued Fractions

Author(s): 
Robert J. Wisner (New Mexico State University)

A "standard" sequence of continued fractions for approximating 3 follows.

1+22=2=2.000000

1+22+22=531.666667

1+22+22+22=74=1.750000

1+22+22+22+22=19111.727273

1+22+22+22+22+22=26151.733333

1+22+22+22+22+22+22=71411.731707

1+22+22+22+22+22+22+22=97561.732143

1+22+22+22+22+22+22+22+22=2651531.732026

1+22+22+22+22+22+22+22+22+22=3622091.732057

1+22+22+22+22+22+22+22+22+22+22=9895711.732049

1+22+22+22+22+22+22+22+22+22+22+22=13517801.732051

These approximations give the same fractions as the Greek ladder table. Thus, it seems fair to declare that the continued fraction method of estimating 3 ties the Greek ladder method.

Robert J. Wisner (New Mexico State University), "A Disquisition on the Square Root of Three - Continued Fractions," Convergence (December 2010), DOI:10.4169/loci003514