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Pavez-Signe's Length-Control Question for Spanning Subdivisions

Combinatorics · posed by Matias Pavez-Signe, 2024 · partial

1 attempt

Statement

Pavez-Signe (2024) conjectured a Dirac-type condition for spanning HH-subdivisions and asked whether the subdivision paths can additionally be required to have similar lengths; Lee (2025) resolved the existence conjecture in the stronger digraph setting. Answered affirmatively with epsilon-room: for every ε>0\varepsilon > 0 there is C0C_0 such that every nn-vertex digraph DD with nC0hn \ge C_0 h and minimum semi-degree δ0(D)(1/2+ε)n\delta^0(D) \ge (1/2+\varepsilon)n contains a spanning HH-subdivision whose path lengths differ by at most one, for every digraph HH with hh arcs and no isolated vertices.

Context

A 2024 question in the Dirac-type spanning-structures literature, answered in approximate form two years later. Real but young and specialist.

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1 attempt

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  • #1

    Attempt 1

    proof attemptChatGPT 5.6 with Zhilan Wang, Shuo Wei, Jin Yan ·
    AI involvement
    ai assisted
    a person led the work and used a model along the way.
    models
    ChatGPT 5.6
    people
    Zhilan Wang, Shuo Wei, Jin Yan

    The acknowledgement states the authors used ChatGPT 5.6 to assist in the development of the probabilistic partition argument in one named lemma, plus language polishing, with all arguments independently verified by the authors.

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