The bypass-map compatibility conjecture for surgery cobordisms

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Let K⊂S3K\subset S^3 be a knot, let S−n3(K)S^3_{-n}(K) be obtained by (−n)(-n)-surgery, and let WW be the natural cobordism from S3S^3 to S−n3(K)S^3_{-n}(K). Let ti:H2(W−n)→Zt_i:H_2(W_{-n})\to\mathbb{Z} be the basic-class label appearing in the decomposition of the cobordism map, and let I+\mathcal{I}_+ denote the relevant summand in the decomposition of framed instanton Floer homology. Bypass-map compatibility conjecture. There exists an integer NN such that, for every integer i∈[0,n−1]i\in[0,n-1], under the identifications

I♯(−S−n3(K))≅I+(−S−n3(K),K^),I♯(−S3)≅I+(−S1/03(K),K),I^{\sharp}(-S^3_{-n}(K))\cong\mathcal{I}_+(-S^3_{-n}(K),\widehat{K}),\qquad I^{\sharp}(-S^3)\cong\mathcal{I}_+(-S^3_{1/0}(K),K),

we have

I♯(W−n,ti)=I♯(W−n)∣I+(−S−n3(K),K^,N−i),I^{\sharp}(W_{-n},t_i)=I^{\sharp}(W_{-n})\big|_{\mathcal{I}_+(-S^3_{-n}(K),\widehat{K},N-i)},

and this cobordism map can be recovered by bypass maps. This conjecture concerns compatibility between the decomposition of the surgery cobordism map and the decomposition of I♯(−S−n3(K))I^{\sharp}(-S^3_{-n}(K)). Its resolution status is not specified in the supplied text.

References

Primary source

Zhenkun Li and Fan Ye, “Instanton Floer homology, sutures, and Heegaard diagrams”, arXiv:2010.07836 (2021).

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