About: http://webisa.webdatacommons.org/223273414

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	February 25, 2015 Here is a link to a talk in Galway, December, 2014, giving further background to this answer, particularly in relation to the history of algebraic topology. share|improve this answer edited Feb 25 at 10:30
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net