Results 21 to 30 of about 1,132 (55)

High-Precision Entropy Values for Spanning Trees in Lattices

open access: yes, 2003
Shrock and Wu have given numerical values for the exponential growth rate of the number of spanning trees in Euclidean lattices. We give a new technique for numerical evaluation that gives much more precise values, together with rigorous bounds on the ...
Ball K   +11 more
core   +1 more source

Lower bounds for bootstrap percolation on Galton-Watson trees [PDF]

open access: yes, 2014
Bootstrap percolation is a cellular automaton modelling the spread of an `infection' on a graph. In this note, we prove a family of lower bounds on the critical probability for $r$-neighbour bootstrap percolation on Galton--Watson trees in terms of ...
Gunderson, Karen, Przykucki, Michał
core   +2 more sources

Dismantling sparse random graphs

open access: yes, 2007
We consider the number of vertices that must be removed from a graph G in order that the remaining subgraph has no component with more than k vertices.
Janson, Svante, Thomason, Andrew
core   +3 more sources

INVARIANT MEASURES CONCENTRATED ON COUNTABLE STRUCTURES

open access: yesForum of Mathematics, Sigma, 2016
Let $L$ be a countable language. We say that a countable infinite $L$
NATHANAEL ACKERMAN   +2 more
doaj   +1 more source

Two-Point Concentration of the Independence Number of the Random Graph

open access: yesForum of Mathematics, Sigma
We show that the independence number of $ G_{n,p}$ is concentrated on two values if $ n^{-2/3+ \epsilon } < p \le 1$ . This result is roughly best possible as an argument of Sah and Sawhney shows that the independence number is not, in ...
Tom Bohman, Jakob Hofstad
doaj   +1 more source

Local Large deviation: A McMillian Theorem for Coloured Random Graph Processes

open access: yes, 2017
For a finite typed graph on $n$ nodes and with type law $\mu,$ we define the so-called spectral potential $\rho_{\lambda}(\,\cdot,\,\mu),$ of the graph.From the $\rho_{\lambda}(\,\cdot,\,\mu)$ we obtain Kullback action or the deviation function ...
Doku-Amponsah, Kwabena
core   +1 more source

The $(k,\ell)$-rainbow index of random graphs [PDF]

open access: yes, 2013
A tree in an edge colored graph is said to be a rainbow tree if no two edges on the tree share the same color. Given two positive integers $k$, $\ell$ with $k\geq 3$, the \emph{$(k,\ell)$-rainbow index} $rx_{k,\ell}(G)$ of $G$ is the minimum number of ...
Cai, Qingqiong   +2 more
core  

Zagreb connection indices on polyomino chains and random polyomino chains

open access: yesOpen Mathematics
In this manuscript, we delve into the exploration of the first and second Zagreb connection indices of both polyomino chains and random polyomino chains. Our methodology relies on the utilization of Markov chain theory. Within this framework, the article
Sigarreta Saylé, Cruz-Suárez Hugo
doaj   +1 more source

The Incipient Giant Component in Bond Percolation on General Finite Weighted Graphs

open access: yes, 2016
On a large finite connected graph let edges $e$ become "open" at independent random Exponential times of arbitrary rates $w_e$. Under minimal assumptions, the time at which a giant component starts to emerge is weakly concentrated around its ...
Aldous, David J.
core   +2 more sources

Cycles in Random Bipartite Graphs [PDF]

open access: yes, 2013
In this paper we study cycles in random bipartite graph $G(n,n,p)$. We prove that if $p\gg n^{-2/3}$, then $G(n,n,p)$ a.a.s. satisfies the following. Every subgraph $G'\subset G(n,n,p)$ with more than $(1+o(1))n^2p/2$ edges contains a cycle of length $t$
Shang, Yilun
core  

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