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Immersed but not embedded homology classes https://arxiv.org/abs/2412.15359 #mathGT

Immersed but not embedded homology classes

We provide the first documented examples of immersions of closed oriented manifolds which are not homologous to embeddings, thus answering a question posed by Zhenhua Liu. In these examples, we show the existence of representing immersions whose double points represent a non-trivial homology class in the source manifold. We also provide examples of Steenrod representable integral homology classes, which are not represented by immersions.

arXiv.org
December 24, 2024 at 3:10 AM · · feed2toot · 0 · 0 · 1
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