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math.GT2025
3-manifolds with more than one abelian embedding
Jonathan A. Hillman
We construct 3-manifolds which have at least two inequivalent embeddings such that both complementary regions have abelian fundamental group.
math.GT2024
The -cohomology rings of 3-manifolds
Jonathan A. Hillman
We give a new argument for the characterization of the cohomology rings of closed 3-manifolds with coefficients , first given by M. M. Postnikov (in terms of intersec…