J. Hillman

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20242026

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math.GT2024

The $F_{2}$ -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 $F_{2}$ , first given by M. M. Postnikov (in terms of intersec…

math.GT2024

Locally flat embeddings of 3-manifolds in $S^{4}$

J. A. Hillman

M. Freedman showed that every homology 3-sphere embeds as a locally flat submanifold of $S^{4}$ . This is in striking contrast to the state of our knowledge of smooth embeddings of ho…

The F2​-cohomology rings of 3-manifolds

Locally flat embeddings of 3-manifolds in S4

The $F_{2}$ -cohomology rings of 3-manifolds

Locally flat embeddings of 3-manifolds in $S^{4}$