Characteristic cone

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The Characteristic cone of a polyhedron, LaTeX: P is

LaTeX: 
\{y: x + y \in P \;\mbox{ for all }\; x \in P\}.

If LaTeX: P = \{x : Ax \le b\}, then its characteristic cone is LaTeX: \{y: Ay \le 0\}, which is the same as the recession cone.


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