منابع مشابه
Conformally flat metrics on 4-manifolds
We prove that for each closed smooth spin 4-manifold M there exists a closed smooth 4-manifold N such that M#N admits a conformally flat Riemannian metric.
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1972
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.69.9.2675