Independent sets in the hypercube revisited

M Jenssen, W Perkins - Journal of the London Mathematical …, 2020 - Wiley Online Library
We revisit Sapozhenko's classic proof on the asymptotics of the number of independent sets
in the discrete hypercube {0, 1} d and Galvin's follow‐up work on weighted independent …

Approximately counting independent sets in bipartite graphs via graph containers

M Jenssen, W Perkins… - Random Structures & …, 2023 - Wiley Online Library
By implementing algorithmic versions of Sapozhenko's graph container methods, we give
new algorithms for approximating the number of independent sets in bipartite graphs. Our …

Lipschitz functions on weak expanders

RA Krueger, L Li, J Park - arxiv preprint arxiv:2408.14702, 2024 - arxiv.org
Given a connected finite graph $ G $, an integer-valued function $ f $ on $ V (G) $ is called $
M $-Lipschitz if the value of $ f $ changes by at most $ M $ along the edges of $ G $. In 2013 …

On the zeroes of hypergraph independence polynomials

D Galvin, G McKinley, W Perkins… - Combinatorics …, 2024 - cambridge.org
We study the locations of complex zeroes of independence polynomials of bounded-degree
hypergraphs. For graphs, this is a long-studied subject with applications to statistical …

Independent sets in the middle two layers of Boolean lattice

J Balogh, RI Garcia, L Li - Journal of Combinatorial Theory, Series A, 2021 - Elsevier
For an odd integer n= 2 d− 1, let B (n, d) be the subgraph of the hypercube Q n induced by
the two largest layers. In this paper, we describe the typical structure of independent sets in …

On Dedekind's problem, a sparse version of Sperner's theorem, and antichains of a given size in the Boolean lattice

M Jenssen, A Malekshahian, J Park - arxiv preprint arxiv:2411.03400, 2024 - arxiv.org
Dedekind's problem, dating back to 1897, asks for the total number $\psi (n) $ of antichains
contained in the Boolean lattice $ B_n $ on $ n $ elements. We study Dedekind's problem …

On the evolution of structure in triangle-free graphs

M Jenssen, W Perkins, A Potukuchi - arxiv preprint arxiv:2312.09202, 2023 - arxiv.org
We study the typical structure and the number of triangle-free graphs with $ n $ vertices and
$ m $ edges where $ m $ is large enough so that a typical triangle-free graph has a cut …

The number of colorings of the middle layers of the hamming cube

L Li, G McKinley, J Park - Combinatorica, 2025 - Springer
For an odd integer\(n= 2d-1\), let\({\mathcal {B}} _d\) be the subgraph of the
hypercube\(Q_n\) induced by the two largest layers. In this paper, we describe the typical …

Long-range order in discrete spin systems

R Peled, Y Spinka - arxiv preprint arxiv:2010.03177, 2020 - arxiv.org
We establish long-range order for discrete nearest-neighbor spin systems on $\mathbb {Z}^
d $ satisfying a certain symmetry assumption, when the dimension $ d $ is higher than an …

The number of maximal independent sets in the Hamming cube

J Kahn, J Park - arxiv preprint arxiv:1909.04283, 2019 - arxiv.org
Let $ Q_n $ be the $ n $-dimensional Hamming cube and $ N= 2^ n $. We prove that the
number of maximal independent sets in $ Q_n $ is asymptotically\[2n2^{N/4},\] as was …