期刊
AMERICAN JOURNAL OF MATHEMATICS
卷 141, 期 3, 页码 737-755出版社
JOHNS HOPKINS UNIV PRESS
DOI: 10.1353/ajm.2019.0015
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资金
- NSERC Discovery Grant
- NSF [DMS-1440140, DMS-1510192]
We give topological conditions to ensure that a noncollapsed almost Ricci-flat 4-manifold admits a Ricci-flat metric. One sufficient condition is that the manifold is spin and has a nonzero (A) over cap -genus. Another condition is that the fundamental group is infinite or, more generally. of sufficiently large cardinality.
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