Publications in Scientific Journals:
W. Fischl, G. Gottlob, D. Longo, R. Pichler:
"HyperBench: A Benchmark and Tool for Hypergraphs and Empirical Findings";
ACM Journal of Experimental Algorithmics,
To cope with the intractability of answering Conjunctive Queries (CQs) and solving Constraint Satisfaction Problems (CSPs), several notions of hypergraph decompositions have been proposed-giving rise to different notions of width, noticeably, plain, generalized, and fractional hypertree width (hw, ghw, and fhw). Given the increasing interest in using such decomposition methods in practice, a publicly accessible repository of decomposition software, as well as a large set of benchmarks, and a web-accessible workbench for inserting, analyzing, and retrieving hypergraphs are called for.
We address this need by providing (i) concrete implementations of hypergraph decompositions (including new practical algorithms), (ii) a new, comprehensive benchmark of hypergraphs stemming from disparate CQ and CSP collections, and (iii) HyperBench, our new web-interface for accessing the benchmark and the results of our analyses. In addition, we describe a number of actual experiments we carried out with this new infrastructure.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Project Head Reinhard Pichler:
Created from the Publication Database of the Vienna University of Technology.