Merging two sorted arrays is a prominent building block for sorting and other functions. Its ecient parallelization requires balancing the load among compute cores, minimizing the extra work brought about by parallelization, and minimizing inter-thread synchronization requirements. Ecient use of memory is also important.
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These regions are called Voronoi cells. The Voronoi diagram of a set of points is dual to its Delaunay triangulation. It is named after Georgy Voronoi, and is also called a Voronoi tessellation, a Voronoi decomposition, a Voronoi partition, or a Dirichlet tessellation (after Peter Gustav Lejeune Dirichlet).