About: http://webisa.webdatacommons.org/152781568

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	In the field of mathematics known as functional analysis, the invariant subspace problem is a partially unresolved problem asking whether every bounded operator on a Banach space sends a non-trivial closed subspace to itself.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org