>>39
追加

ここらを眺めて、目を慣らしておくのが良いかも

（参考）
https://www.math.upenn.edu/~pop/Research/files-Res/LondonON_talk.pdf
University of Western Ontario
Distinguished Lecture Series, April 2008
New Developments in Anabelian Geometry
Florian Pop, University of Pennsylvania
(抜粋)
LECTURE I: Galois via Topology
§ 3. Etale/algebr. fundam. groups

https://www.math.upenn.edu/~pop/
Florian Pop's Home Page
Samuel D. Schack Professor of Algebra
Professor of Mathematics
University of Pennsylvania