TITLE: History of profinite groups, when was it first mentioned? What was the original definition?
QUESTION [10 upvotes]: Searching left me hanging. One of my professors told me the definition using the topological properties was the first one but I cannot find any resources. Is that true? If not, how was it originally defined? References would be lovely.
Best regards

REPLY [4 votes]: See also W.Krull-Galoische theorie der unendlichen algebraischen erweiterungen-Mathematische Annalen,100,1928
The concept is there,maybee not the name