3 papers
math.AG2003
On the "Section Conjecture" in anabelian geometry
Jochen Koenigsmann
Let X be a smooth projective curve of genus >1 over a field K which is finitely generated over the rationals. The section conjecture in Grothendieck's anabelian geometry says that…
math.NT2000
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
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.