The Orbifold Mordell Conjecture for orbifold curves

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Let (X,Δ)(X,\Delta) be a smooth proper orbifold curve over a number field KK, where Δ=∑i(1−1mi)Di\Delta=\sum_i(1-\frac{1}{m_i})D_i, and call (X,Δ)(X,\Delta) Mordellic if, after every finite field extension and for every regular finitely generated integral model, the set of orbifold maps from the model's base is finite. Orbifold Mordell Conjecture. If (X,Δ)(X,\Delta) is of general type, then (X,Δ)(X,\Delta) is Mordellic. The conjecture is open for every general-type orbifold curve whose boundary has only finite multiplicities and whose underlying curve has genus at most one.

References

Primary source

Finn Bartsch, Frédéric Campana, Ariyan Javanpeykar and Olivier Wittenberg, “The Weakly Special Conjecture contradicts orbifold Mordell, and hence the abc conjecture”, arXiv:2410.06643 (2026).

Additional references

2 papers in this index state this conjecture (2004–2024). The statement above is taken from the most recent of them; the others are arXiv:math/0410469.

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