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单词 KreinMilmanTheorem
释义

Krein-Milman theorem


Theorem.

Let X be a locally convex topological vector space, and let KXbe a compact convex subset (http://planetmath.org/ConvexSet). Then K is the closed convex hullMathworldPlanetmath of its extreme pointsPlanetmathPlanetmath.

The closed convex hull above is defined as the intersection of all closed convex subsets of X that contain K. This turns out to be the same as the closure of the convex hull in a topological vector spaceMathworldPlanetmath.

References

  • 1 H. L. Royden. . Prentice-Hall, Englewood Cliffs, New Jersey, 1988
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