1 citations · 1 across the 2 of their papers we have counts for
2 papers
math.DG2012
The scalar curvature and the biorthogonal curvature: A pinching problem
Ezio Araujo Costa
The famous pinching problem says that on a compact simply connected -manifold if its sectional curvature satisfies , then the manifold is homeomorphi…
math.DG2012★ 1 cited
A modified Yamabe invariant and a Hopf conjecture
Ezio Araujo Costa
In this paper we define the bi-orthogonal sectional curvature and we present two modified Yamabe invariants for compact 4-dimensional manifolds. In particular we obtained a relatio…