We study conformal product structures on compact reducible Riemannian manifolds, and show that under a suitable technical assumption, the underlying Riemannian mani\-folds are either conformally flat, or triple products, i. e. locally isometric to Riemannian manifolds of the form (M, g) with M=M₁ M₂ M₃ and g=e^2fg₁+g₂+g₃, where gᵢ is a Riemannian metric on Mᵢ, for i\1, 2, 3\, and f C^ (M₁ M₂).
Moroianu et al. (Sun,) studied this question.
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