Reduced systems conjecture for blow-ups of Hirzebruch surfaces

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Let Fe,r\mathbb{F}_{e,r} be the blow-up of a Hirzebruch surface Fe\mathbb{F}_e at very general points, and let C~e\widetilde{C}_e be the strict transform of its negative section. A non-empty linear system L\mathcal{L} is reduced when its general curve is reduced, and C~e\widetilde{C}_e is not a fixed component when every member does not contain it as a fixed component. Reduced systems conjecture. If the general curve of a non-empty linear system L\mathcal{L} on Fe,r\mathbb{F}_{e,r} is reduced and C~e\widetilde{C}_e is not a fixed component of L\mathcal{L}, then L\mathcal{L} is non-special. The paper states that Laface's conjecture implies this conjecture, but the supplied text gives no resolution of either claim.

References

Primary source

Krishna Hanumanthu, Cyril J. Jacob, Suhas B. N. and Amit Kumar Singh, “Seshadri constants on blow-ups of Hirzebruch surfaces”, arXiv:2312.14555 (2024).

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