A 1929 paper of Chittenden contains the following sentence (about the derived set operator on a space $P$):

“Thus the relation $E' = K(E)$ defines a single-valued set-valued set-function, whose range is the class of all subsets of $P,$ and whose values are also subsets of $P.$”

Since he used range to mean domain (in current terminology), it made me wonder when the currently used terms became the norm. It evidently wasn't before 1929.



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