+**Convex** describes a shape or [Set](/wiki/Set) where, for any two points within it, the straight line segment connecting them lies entirely within the shape. This fundamental property is crucial in [Optimization](/wiki/Optimization) and the study of spaces, defining boundaries that always "bulge out" rather than in.
+## See also
+- [Concave](/wiki/Concave)
+- [Geometry](/wiki/Geometry)
+- [Function](/wiki/Function)
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