30 citations · 80 across the 23 of their papers we have counts for
3 papers · 2 filters
Coincidence among families of mesh patterns
Anders Claesson, Bridget Eileen Tenner, Henning Ulfarsson
Two mesh patterns are coincident if they are avoided by the same set of permutations. In this paper, we provide necessary conditions for this coincidence, which include having the…
Wilf-classification of mesh patterns of short length
Ísak Hilmarsson, Ingibjörg Jónsdóttir, Steinunn Sigurðardóttir +2
This paper starts the Wilf-classification of mesh patterns of length 2. Although there are initially 1024 patterns to consider we introduce automatic methods to reduce the number o…
Collatz meets Fibonacci
Michael Albert, Bjarki Gudmundsson, Henning Ulfarsson
The Collatz map is defined for a positive even integer as half that integer, and for a positive odd integer as that integer threefold, plus one. The Collatz conjecture states that…