Generic no-cut-and-paste conjecture for Lorenz maps

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Let OO be the collection of vector fields under consideration, let L\mathcal{L} be the collection of Lorenz maps that form factor maps for vector fields V∈OV\in O, and let CP\mathcal{CP} be the collection of Lorenz maps that do not satisfy the general cut-and-paste condition. Generic no-cut-and-paste conjecture. There should be a topology on L\mathcal{L} such that CP\mathcal{CP} is open and dense, the reduction theorem defines a surjective map

F:O→L,\mathcal{F}:O\to\mathcal{L},

matching each vector field with its corresponding Lorenz map, F\mathcal{F} is continuous for the C1C^1 topology on OO and this topology on L\mathcal{L}, and

F−1(L∖CP)\mathcal{F}^{-1}(\mathcal{L}\setminus\mathcal{CP})

is precisely the collection of vector fields in OO generating a pair of homoclinic trajectories to the origin. The claim concerns the genericity of the no-cut-and-paste condition and the relation between its failure and homoclinic pairs; the source leaves the appropriate topology and the asserted correspondence unresolved.

References

Primary source

Łukasz Cholewa and Eran Igra, “Kneading the Lorenz attractor”, arXiv:2511.02568 (2025).

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