Orthant polyhedra
An orthant polyhedron is a polyhedron with $m$ hyperfaces, that could be realized as a section of the $m$-dimensional non-negative orthant. We classify all 2-dimensional orthant polyhedra and provide some partial results towards the classification of higher dimensional orthant polyhedra. As a consequence of our results we show that every polytope could be realized as a section of the $n$-dimensional non-negative orthant with $n$ being big enough.
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