6 citations · 9 across the 2 of their papers we have counts for
3 papers
math.NT2019
Recounting the rationals
Sam Northshield
In 1999, Neil Calkin and Herbert Wilf wrote "Recounting the rationals" which gave an explicit bijection between the positive integers and the positive rationals. We find several di…
math.CO2015★ 3 cited
Three analogues of Stern's diatomic sequence
Sam Northshield
We generalize Stern's diatomic sequence in three ways.
math.NT2015★ 6 cited
Ford Circles and Spheres
Sam Northshield
Ford circles are parameterized by the rational numbers but are also the result of an iterative geometric procedure. We review this and introduce an apparently new parameterization…