4 citations · 9 across the 6 of their papers we have counts for
4 papers · 1 filter
The Borsuk-Ulam theorem for closed 3-dimensional manifolds having Nil Geometry
A. Bauval, D. L. Gonçalves, C. Hayat
Let M be a closed, connected 3-manifold which admits Nil geometry, we determine all free involutions on M and the Borsuk-Ulam index of .
The Borsuk-Ulam theorem for the Seifert manifolds having flat geometry
A. Bauval, D. L. Gonçalves, C. Hayat
Let M be a Seifert manifold which belongs to the geometry Flat. In this work we determine all the free involutions τ on M, and the Borsuk-Ulam indice of (M,τ).
Reidemeister-Schreier's Algorithm For 2-Coverings of Seifert Manilfolds
A. Bauval, C. Hayat
It is classical that given any Seifert structure on N, Reidemeister-Schreier's algorithm produces a presentation of all index 2 subgroups of the fundamental group of N, described a…
Classifications of special double-coverings associated to a non-orientable surface
Anne Bauval, Claude Hayat
This paper investigates some actions "à la Johnson" on the set, denoted by , of Spin-structures which are interpreted as special double-coverings of a trivial fibra…