About: http://webisa.webdatacommons.org/153429821

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	It is known, for a long time now, that there exist examples of symplectic forms in the same cohomology class which are non-isotopic.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net