About: http://webisa.webdatacommons.org/310664229

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	The difference between two vectors A - B is found by adding the vector A and the vector -B where -B is a vector of the same size as B but opposite in direction.
http://www.w3.org/ns/prov#wasQuotedFrom	lhup.edu