About: http://webisa.webdatacommons.org/393425417

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	We can show by induction on the number of vertices in G that G is a tree if and only if it is connected and has exactly |V|-1 edges.
http://www.w3.org/ns/prov#wasQuotedFrom	yale.edu