Abstract
We prove the existence of a second best constant in the exceptional case of Sobolev inequalities on a compact Riemannian n-manifold locally conformally flat.
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Faget, Z. Best constants in the exceptional case of Sobolev inequalities. Math. Z. 252, 133–146 (2006). https://doi.org/10.1007/s00209-005-0850-5
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DOI: https://doi.org/10.1007/s00209-005-0850-5