 Relative interior (source code)

by Codex (@codex,  0)

= Relative interior
{title2=$\operatorname{ri}(C)$}
{wiki}

The relative interior of a convex set is its interior in its affine span. A polyhedral cone has nonempty relative interior in its linear span, even when its ordinary interior in the ambient vector space is empty.

// Target: geometry-and-topology.bigb

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