Statistical mechanics perspective on the phase transition in vertex covering of finite-connectivity random graphs

AK Hartmann, M Weigt - Theoretical Computer Science, 2001 - Elsevier
The vertex-cover problem is studied for random graphs GN, cN having N vertices and cN
edges. Exact numerical results are obtained by a branch-and-bound algorithm. It is found …

Number of guards needed by a museum: A phase transition in vertex covering of random graphs

M Weigt, AK Hartmann - Physical review letters, 2000 - APS
In this Letter we study the NP-complete vertex cover problem on finite connectivity random
graphs. When the allowed size of the cover set is decreased, a discontinuous transition in …

Statistical mechanics of the vertex-cover problem

AK Hartmann, M Weigt - Journal of Physics A: Mathematical and …, 2003 - iopscience.iop.org
We review recent progress in the study of the vertex-cover problem (VC). The VC belongs to
the class of NP-complete graph theoretical problems, which plays a central role in …

Typical solution time for a vertex-covering algorithm on finite-connectivity random graphs

M Weigt, AK Hartmann - Physical Review Letters, 2001 - APS
We analytically describe the typical solution time needed by a backtracking algorithm to
solve the vertex-cover problem on finite-connectivity random graphs. We find two different …

Clustering analysis of the ground-state structure of the vertex-cover problem

W Barthel, AK Hartmann - Physical Review E—Statistical, Nonlinear, and Soft …, 2004 - APS
Vertex cover is one of the classical NP-complete problems in theoretical computer science.
A vertex cover of a graph is a subset of vertices such that for each edge at least one of the …

Minimum vertex cover problems on random hypergraphs: replica symmetric solution and a leaf removal algorithm

S Takabe, K Hukushima - Physical Review E, 2014 - APS
The minimum vertex-cover problems on random α-uniform hypergraphs are studied using
two different approaches, a replica method in statistical mechanics of random systems and a …

Effect of constraint relaxation on the minimum vertex cover problem in random graphs

A Dote, K Hukushima - Physical Review E, 2024 - APS
A statistical-mechanical study of the effect of constraint relaxation on the minimum vertex
cover problem in Erdős-Rényi random graphs is presented. Using a penalty-method …

Stability analysis on the finite-temperature replica-symmetric and first-step replica-symmetry-broken cavity solutions of the random vertex cover problem

P Zhang, Y Zeng, H Zhou - Physical Review E—Statistical, Nonlinear, and Soft …, 2009 - APS
The vertex cover problem is a prototypical hard combinatorial optimization problem. It was
studied in recent years by physicists using the cavity method of statistical mechanics. In this …

The phase transition in inhomogeneous random graphs

B Bollobás, S Janson, O Riordan - Random Structures & …, 2007 - Wiley Online Library
The “classical” random graph models, in particular G (n, p), are “homogeneous,” in the
sense that the degrees (for example) tend to be concentrated around a typical value. Many …

The asymptotic variance of the giant component of configuration model random graphs

F Ball, P Neal - 2017 - projecteuclid.org
For a supercritical configuration model random graph, it is well known that, subject to mild
conditions, there exists a unique giant component, whose size R_n is O(n), where n is the …