2 papers
math.CO2020
Graphical Enumeration and Stained Glass Windows, 1: Rectangular Grids
Lars Blomberg, Scott R. Shannon, N. J. A. Sloane
A survey of enumeration problems arising from the study of graphs formed when the edges of a polygon are marked with evenly spaced points and every pair of points is joined by a li…
math.NT2019
"Choix de Bruxelles": A New Operation on Positive Integers
Eric Angelini, Lars Blomberg, Charlie Neder +2
The "Choix de Bruxelles" operation replaces a positive integer n by any of the numbers that can be obtained by halving or doubling a substring of the decimal representation of n. F…