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math.DG2017★ 11 cited
Almost complex structures on spheres
Panagiotis Konstantis, Maurizio Parton
In this paper we review the well-known fact that the only spheres admitting an almost complex structure are S^2 and S^6. The proof described here uses characteristic classes and th…
math.DG2014★ 2 cited
A classification of Thurston geometries without compact quotients
Panagiotis Konstantis, Frank Loose
We classify pairs where is a --dimensional simply connected smooth manifold and a Lie group acting on transitively, effectively with compact isotropy group.