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Line 25: If ''C'' has nonempty interior, then ''C'' is ''pointed'', i.e. ''C'' contains no line in its entirety. If ''C'' is a cone and the closure of ''C'' is pointed, then ''C'' has nonempty interior. ''C**'' is the closure of the smallest convex cone containing ''C''. (consequence of the [[hyperplane separation theorem]]) ==Self-dual cones==

Dual cone and polar cone: Difference between revisions