Linked from
The 24 pages that link to Convex optimization, each with the reason it gives.
Convex setRelated: Convex feasible sets help ensure that local optima are global optima.
Convex geometryRelated: Convex sets make local optima global under standard conditions.
ConvexityNarrower topic: Convexity ensures that every local minimum is global.
Maximum and minimumBroader topic: Convexity can make a local minimum a global minimum.