Boshernitzan–Kornfeld conjecture on the prevalence of finite type interval translation maps

From papers

Let r2r\geqslant 2, and let ITM(r)\mathrm{ITM}(r) denote the space of interval translation maps on rr intervals. An interval translation map is of infinite type when, for its attractor construction Xn=Tn(I)X_n=T^n(I), one has Xn+1XnX_{n+1}\subsetneq X_n for every nn. Boshernitzan–Kornfeld conjecture. For all r2r\geqslant 2, the set of all infinite type ITM\mathrm{ITM}s on rr intervals is a measure zero subset of ITM(r)\mathrm{ITM}(r). The conjecture asserts that infinite type behavior is rare among interval translation maps; equivalently, finite type should be prevalent in measure for every number of intervals. The source gives no resolution, so the conjecture remains open.

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Sources & referencesView supporting material

Primary source

Kostiantyn Drach, Leon Staresinic and Sebastian van Strien, “Topological Prevalence of Finite Type Interval Translation Maps”, arXiv:2605.00186 (2026).

Additional references

5 papers in this index state this conjecture (2021–2026). The statement above is taken from the most recent of them; the others are arXiv:2605.00173, arXiv:2603.19401, arXiv:2412.07928, arXiv:2102.11803.

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