Universal minimal-entropy conjecture for 2-fold branched covers of links

For a link LL in S3S^3, let MLS3M_L\to S^3 be the 22-fold branched cover branched over LL. The quantity g(ML)\ell_g(M_L) denotes the minimal entropy associated with MLM_L. Universal minimal-entropy conjecture. For any link LL in S3S^3, we have

g(ML)1g.\ell_g(M_L)\asymp \dfrac{1}{g}.

The preceding results establish this behavior for infinitely many links, including links whose branched covers give non-hyperbolic and hyperbolic 33-manifolds, but the assertion for every link remains open.

Sources & referencesView supporting material

Primary source

Susumu Hirose and Eiko Kin, “Braids, entropies and fibered 2-fold branched covers of 3-manifolds”, arXiv:2210.00661 (2022).

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