Title
Counting inequivalent monotone Boolean functions.
Abstract
Monotone Boolean functions (MBFs) are Boolean functions f:{0,1}^n-{0,1} satisfying the monotonicity condition x@?y@?f(x)@?f(y) for any x,y@?{0,1}^n. The number of MBFs in n variables is known as the nth Dedekind number. It is a longstanding computational challenge to determine these numbers exactly: these values are only known for n at most 8. Two monotone Boolean functions are equivalent if one can be obtained from the other by permuting the variables. The number of inequivalent MBFs in n variables was known only for up to n=6. In this paper we propose a strategy to count inequivalent MBFs by breaking the calculation into parts based on the profiles of these functions. As a result we are able to compute the number of inequivalent MBFs in 7 variables. The number obtained is 490013148.
Year
DOI
Venue
2012
10.1016/j.dam.2013.11.015
Discrete Applied Mathematics
Keywords
DocType
Volume
longstanding computational challenge,nth dedekind number,monotone boolean function,inequivalent mbfs,inequivalent monotone boolean function,monotonicity condition,boolean function,n variable
Journal
167
ISSN
Citations 
PageRank 
0166-218X
5
0.54
References 
Authors
5
2
Name
Order
Citations
PageRank
Tamon Stephen112116.03
Timothy Yusun261.24