Persistent homology analysis of multiqubit entanglement

We introduce a homology-based technique for the classification of multiqubit state vectors with genuine entanglement. In our approach, we associate state vectors to data sets by introducing a metric-like measure in terms of bipartite entanglement, and investigate the persistence of homologies at different scales. This leads to a novel classification of multiqubit entanglement. The relative occurrence frequency of various classes of entangled states is also shown.

Constititional Judiciary in Central Europe and the Europe Agreement: Decision 30/1998 (VI.25) AB of the Hungarian Constitutional Court

Against a background of increasingly intense legal harmonisation and with the prospects of Central European accession to the EU drawing ever closer, a recent decision of the Hungarian Constitutional Court, Dec.30/1998 (VI.25) AB1 has highlighted the constitutional implications of applying EC law in the domestic system of an associate state. The judgment itself concerned the constitutionality of the competition provisions of the EC-Hungary Europe Agreement (“EA”) together with Decision 2/96 of the Association Council on the relevant Implementing Rules (“IR”). While the Hungarian court is not the first of its type in an associate state to deal with the effect internally of an Association Agreement,2 nevertheless its decision offers certain insights into the judicial response to the integration process in Central Europe.