STABILITY OF CLOSEDNESS OF CONVEX CONES UNDER LINEAR MAPPINGS II
In this paper we revisit the question of when the continuous linear image of a fixed closed convex cone $K$ is closed. Specifically, we improve the main result of  by showing that for all, except for at most a $\sigma$-porous set, of the linear mappings $T$ from $R^n$ into $R^m$, not only is $T(K)$ closed, but there is also a neighbourhood around $T$ whose members also preserve the closedness of $K$.
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