16 citations · 70 across the 19 of their papers we have counts for
5 papers · 1 filter
Seifert fibrations of lens spaces over non-orientable bases
Hansjörg Geiges, Christian Lange
We classify the Seifert fibrations of lens spaces where the base orbifold is non-orientable. This is an addendum to our earlier paper `Seifert fibrations of lens spaces'. We correc…
Seifert fibrations of lens spaces
Hansjörg Geiges, Christian Lange
We classify the Seifert fibrations of any given lens space L(p,q). We give an algorithmic construction of a Seifert fibration of L(p,q) over the base orbifold S^2(m,n) with the cop…
When is the underlying space of an orbifold a manifold with boundary?
Christian Lange
We answer the question of when the underlying space of an orbifold is a manifold with boundary in several categories.
Characterization of finite groups generated by reflections and rotations
Christian Lange
We characterize finite groups G generated by orthogonal transformations in a finite-dimensional Euclidean space V whose fixed point subspace has codimension one or two in terms of…
Equivariant smoothing of piecewise linear manifolds
Christian Lange
We prove that every piecewise linear manifold of dimension up to four on which a finite group acts by piecewise linear homeomorphisms admits a compatible smooth structure with resp…