O(n log n) algorithm and matching Omega(n log n) lower bound for partitioning a simple polygon's boundary into the minimum number of contiguous visible segments.
Two np-hard art-gallery problems for ortho-polygons.Mathematical Logic Quarterly, 41(2):261–267
3 Pith papers cite this work. Polarity classification is still indexing.
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Introduces a rank measure for FO logic and proves a rank-preserving Gaifman normal form, yielding a simplified proof for almost-linear time decision of FO properties on nowhere-dense structures.
The coq-paradoxes library mechanizes Burali-Forti, Diaconescu, Reynolds, and Hurkens paradoxes to specify the placement of impredicativity, large elimination restrictions, and universe discipline in Rocq's CIC kernel.
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The Contiguous Art Gallery Problem is in {\Theta}(n log n)
O(n log n) algorithm and matching Omega(n log n) lower bound for partitioning a simple polygon's boundary into the minimum number of contiguous visible segments.