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Convexly Independent Subsets of the Minkowski Sum of Planar Point Sets
Let $P$ and $Q$ be finite sets of points in the plane. In this note we consider the largest cardinality of a subset of the Minkowski sum $S\subseteq P \oplus Q$ which consist of convexly independent points. We show that, if $|P| = m$ and $|Q| = n$ then $|S| …