Similar Search Results

Effective dimensions in networks with long-range connections

Moukarzel, Cristian F. - In: Physica A: Statistical Mechanics and its Applications 356 (2005) 1, pp. 157-161

networks topologically similar to random graphs. An effective dimension dchem(μ) can be defined in terms of the shortest …

Persistent link: https://www.econbiz.de/10011062380

Ising model with spins S=1/2 and 1 on directed and undirected Erdös–Rényi random graphs

Lima, F.W.S.; Sumour, M.A. - In: Physica A: Statistical Mechanics and its Applications 391 (2012) 4, pp. 948-953

–Rényi (ER) random graphs, with z neighbors for each spin. In the case with spin S=1/2, the undirected and directed ER graphs … graphs the model presents a spontaneous magnetization at p=z/N(z=2,3,…,N), but no spontaneous magnetization at p=1/N which is … the percolation threshold. For both directed and undirected ER graphs with spin S=1, we find a first-order phase …

Persistent link: https://www.econbiz.de/10011063450

Ultrametricity in fund of funds diversification

Miceli, M.A.; Susinno, G. - In: Physica A: Statistical Mechanics and its Applications 344 (2004) 1, pp. 95-99

Minimum market transparency requirements impose hedge fund (HF) managers to use the statement declared strategy in practice. However, each declared strategy may actually generate a multiplicity of implemented management decisions. Is then the “actual ” strategy the same as the...

Persistent link: https://www.econbiz.de/10011063884

Temporal graphs

Kostakos, Vassilis - In: Physica A: Statistical Mechanics and its Applications 388 (2009) 6, pp. 1007-1023

We introduce the idea of temporal graphs, a representation that encodes temporal data into graphs while fully retaining … number of metrics that can be used to study and explore temporal graphs. Finally, we use temporal graphs to analyse real …

Persistent link: https://www.econbiz.de/10010591485

Determination of the order of phase transitions in Potts model by the graph-weight approach

Glumac, Zvonko; Uzelac, Katarina - In: Physica A: Statistical Mechanics and its Applications 271 (1999) 1, pp. 147-156

We examine the order of the phase transition in the Potts model by using the graph representation for the partition function, which allows treating a non-integer number of Potts states. The order of transition is determined by the analysis of the shape of the graph-weight probability...

Persistent link: https://www.econbiz.de/10010873775

Graphs and concepts of entropy for studying disorder in d-dimensional distributions of points

Loeffler, Armin; Rasigni, Monique - In: Physica A: Statistical Mechanics and its Applications 276 (2000) 3, pp. 535-549

–Leibler's entropy as pertaining to graph edge-length distributions. This relative entropy uses the edge-length distribution of graphs …

Persistent link: https://www.econbiz.de/10010874372

Efficiency of star-like graphs and the Atlanta subway network

Ek, Bryan; VerSchneider, Caitlin; Narayan, Darren A. - In: Physica A: Statistical Mechanics and its Applications 392 (2013) 21, pp. 5481-5489

The distance d(i,j) between any two vertices i and j in a graph is the number of edges in a shortest path between i and j. If there is no path connecting i and j, then d(i,j)=∞. In 2001, Latora and Marchiori introduced the measure of efficiency between vertices in a graph (Latora and...

Persistent link: https://www.econbiz.de/10011059787

Percolation in networks with long-range connections

Moukarzel, Cristian F. - In: Physica A: Statistical Mechanics and its Applications 372 (2006) 2, pp. 340-345

topologically similar to random graphs. Percolation on these networks is numerically studied for systems of up to 107 sites. The …

Persistent link: https://www.econbiz.de/10011060388

Dimers and the Ising model

Cisło, Jerzy - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 26, pp. 6535-6537

We present a innovative relationship between ground states of the Ising model and dimer coverings which sheds new light on the Ising models with highly degenerate ground states and enables one to construct such models. Thanks to this relationship we also find the generating function for dimers...

Persistent link: https://www.econbiz.de/10011060830