Given a continuous function $f$ that is quasi-convex over some interval $[a,b] \subset \mathbb{R}$, what are examples of additional (sets of) properties (themselves weaker than convexity) that ensure that $f$ is also convex over that interval?
2026-03-25 19:02:24.1774465344
Quasiconvexity + X implies convexity
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