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Piercing the Chessboard

Ambrus, GERGELY; Barany, IMRE; Frankl, PETER; Varga, DANIEL; (2023) Piercing the Chessboard. SIAM Journal on Discrete Mathematics , 37 (3) pp. 1457-1471. 10.1137/21M146048X. Green open access

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Abstract

We consider the minimum number of lines and needed to intersect or pierce, respectively, all the cells of the chessboard. Determining these values can also be interpreted as a strengthening of the classical plank problem for integer points. Using the symmetric plank theorem of K. Ball, we prove that for each . Studying the piercing problem, we show that for , where the upper bound is conjectured to be sharp. The lower bound is proven by using the linear programming method, whose limitations are also demonstrated.

Type: Article
Title: Piercing the Chessboard
Open access status: An open access version is available from UCL Discovery
DOI: 10.1137/21M146048X
Publisher version: http://dx.doi.org/10.1137/21m146048x
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Physical Sciences, Mathematics, Applied, Mathematics, cells in a lattice, lines, discrete plank problems, DISCRETE REPRESENTATION, ALGORITHM
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10186957
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