2 citations · 2 across the 1 of their papers we have counts for
5 papers
Non-existence of orthogonal complex structures on the round 6-sphere
Ana Cristina Ferreira
In this short note, we review the well-known result that there is no orthogonal complex structure on the 6-sphere with respect to the round metric.
Palais leaf-space manifolds and surfaces carrying holomorphic flows
Ana Cristina Ferreira, Julio C. Rebelo, Helena Reis
Starting from some remarkable singularities of holomorphic vector fields, we construct (open) complex surfaces over which the singularities in question are realized by complete vec…
Complete commuting vector fields and their singular points in dimension 2
Ana Cristina Ferreira, Julio C. Rebelo, Helena Reis
We classify degenerate singular points of $\C^2$-actions on complex surfaces.
Tangent Lie groups are Riemannian naturally reductive spaces
Ilka Agricola, Ana Cristina Ferreira
Given a compact Lie group with Lie algebra , we consider its tangent Lie group . In this short note, we prove that $T…
A vanishing theorem in twisted de Rham cohomology
Ana Cristina Ferreira
We prove a vanishing theorem for the twisted de Rham cohomology of a compact manifold.