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The points of an <math>n\times n</math> grid have <math>\Theta(n^{4/3})</math> convex layers,<ref>{{citation
| last1 = Har-Peled | first1 = Sariel | author1-link = Sariel Har-Peled
| last2 = Lidický | first2 = Bernard
| doi = 10.1137/120892660
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