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math.CO2026
Piercing boxes and products of trees
Wei Rao, Taehyun Eom, Minki Kim
We give a new upper bound on the piercing number of a finite family of axis-parallel rectangles in the plane when every members contain an inters…
math.CO2026
A note on piercing discrete rectangles
Wei Rao
In 2008, Halman proved a discrete Helly-type theorem for axis-parallel boxes in . Very recently, this result was extended to the setting with $p \geq q \geq d+…