derive a lower bound for the conformal Yamabe constant of the product manifold $(V\times W, g+ h) $ in terms of the conformal Yamabe constants of $(V, g) $ and $(W, h) $. References
Abstract
Let and be compact Riemannian manifolds of dimension at least . We derive a lower bound for the conformal Yamabe constant of the product manifold in terms of the conformal Yamabe constants of and . References