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. 
Nikolay Pechenkin
math.MG