Graphing injectivity for rational homotopy and homology of string-link spaces

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Fix m≥2m\geq 2, k≥1k\geq 1, and n≥3n\geq 3. Let

G:ΩkConf⁡(m,Rn)⟶Emb⁡c(∐mRk,Rn+k)G:\Omega^k\operatorname{Conf}(m,\mathbb R^n)\longrightarrow \operatorname{Emb}_c\left(\coprod_m\mathbb R^k,\mathbb R^{n+k}\right)

be the graphing map. Graphing injectivity conjecture. The induced maps on rational homotopy and rational homology are injective:

π∗(G)⊗QandH∗(G;Q)\pi_*(G)\otimes\mathbb Q\quad\text{and}\quad H_*(G;\mathbb Q)

are injective.

The conjecture strengthens the paper's integral injectivity result on the subspace of homotopy classes represented by brackets with distinct generators. It concerns the full rational homotopy and homology of the looped configuration space and the corresponding string-link space.

References

Primary source

Rafal Komendarczyk, Robin Koytcheff and Ismar Volic, “Diagrams for primitive cycles in spaces of pure braids and string links”, arXiv:2106.11441 (2023).

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