About: http://webisa.webdatacommons.org/108918794

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	Also, there is a section for which function is convex (when ,???).The gradient vector is always available when is positive. is always positive, so the is not concave and the extremum points will be in types of minimum points.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com