This HTML5 document contains 1 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

PrefixNamespace IRI
rdfshttp://www.w3.org/2000/01/rdf-schema#
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
xsdhhttp://www.w3.org/2001/XMLSchema#
dbpediahttp://dbpedia.org/resource/
Subject Item
dbpedia:Postnikov_square
rdfs:comment
In algebraic topology, a Postnikov square is a certain cohomology operation from a first cohomology group H1 to a third cohomology group H3, introduced by Postnikov (1949). Eilenberg (1952) described a generalization taking classes in Ht to H2t+1.