Instance: ising2.5-250_5555, Dataset: L
Ising Spinglass instances generated by Frauke Liers (2004)
- ising2.5-n_seed: For each dimension three one-dimensional Ising chain instances. n=100,150,200,250,300.
- ising3.0-n_seed: For each dimension three one-dimensional Ising chain instances. n=100,150,200,250,300.
- t2gn_seed: For each dimension three two-dimensional toroidal grid graphs with gaussian distributed weights and dimension n times n, n=10,15,20.
- t3gn_seed: For each dimension three three-dimensional toroidal grid graphs with gaussian distributed weights and dimension n times n times n, n=5,6,7.
These instances are also part of the Biq Mac Library (2007)
Attention: As opposed to other representations of some of these instances, ours do not contain zero-weight edges or coeffcients in accordance with our format specifications.
Download links: .mc version
, .bq version
A visualisation of the instance, created with OGDF
(click to enlarge).
Edge Weight Plot
A plot showing the frequency of edge weights, for a high-level overview of the edge weight distributions (click to enlarge).