About: http://webisa.webdatacommons.org/38691320

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	That is, if n is a positive integer, then $$\phi(n)$$ is the number of integers k in the range 1 ??? k ??? n for which $$gcd(n, k) = 1$$.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com