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math.NT2000★ 1 cited
Relatively projective groups as absolute Galois groups
Jochen Koenigsmann
By two well-known results, one of Ax, one of Lubotzky and van den Dries, a profinite group is projective iff it is isomorphic to the absolute Galois group of a pseudo-algebraically…
math.NT2000★ 2 cited
Free product of absolute Galois groups
Dan Haran, Moshe Jarden, Jochen Koenigsmann
The free profinite product of finitely many absolute Galois group is an absolute Galois group.