A looming of phantoms
Advances in Mathematics 499 (2026), article 111046.
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We construct new examples of phantom categories in the derived categories of two kinds of rational surfaces: the blowup of the plane at 11 points in general position, and the blowup of the second Hirzebruch surface at nine points in general position. We also propose conjectures for blowups of other Hirzebruch surfaces.