About: http://webisa.webdatacommons.org/90309682

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 know from the definition of inner product and norm, that $u^Tu$ is always larger than zero, except the case where $u=0$ at which case it is zero.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com