Cluster analysis involves the problem of optimal partitioning of a given set of entities into a pre-assigned number of mutually exclusive and exhaustive clusters. Here the problem is formulated in two ...

The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, connects quantum mechanics to infinitely intricate mathematical structures. Hofstadter was ...

Bulletin mathématique de la Société des Sciences Mathématiques de Roumanie, Nouvelle Série, Vol. 57 (105), No. 1 (2014), pp. 93-100 (8 pages) Recently, Miao and Wang considered the GSI method for ...

New Social Security report raises alarms for 300 million Americans Deserters used to be shot – now they’re coming to Ukraine’s rescue 1 dead, 6 injured after gunman opens fire on sidewalk: 'Sickening ...