About: http://webisa.webdatacommons.org/258693046

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	I read paper, in page 21, there is a proposition: Let $(M,\omega)$ be a closed symplectic manifold with $\pi_2(M)=0$.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net