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Reference.org
Recession cone
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<p>In <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, especially <a href="/facts/Convex_analysis/SGhUNLMK">convex analysis</a>, the recession cone of a set A {\displaystyle A} is a <a href="/facts/Cone_(linear_algebra)/h1tARfw4">cone</a> containing all <a href="/facts/Vector_(mathematics)/U8mM7A5F">vectors</a> such that A {\displaystyle A} <i>recedes</i> in that direction. That is, the set extends outward in all the directions given by the recession cone. </p>