Linear mapping of sliced hyperbox
Yaron Berman
yaronber at cs.huji.ac.il
Tue Oct 5 10:43:33 PDT 2004
Hello,
It is well known that a linear mapping of an n-dimensional hyperbox is a
zonotope, and when the mapping is to R^2, it is simply a convex
centrally symmetric polygon with at most 2n vertices, which is easy to
compute (in O(nlogn) time).
My question is about the linear map of a hyperbox intersected with a
halfspace whose boundary contains the origin (which is also the center
of the box), that is a box sliced through its center.
Is there some efficient way to compute the map (still a convex polygon),
other than enumerating all the 2^n vertices of the sliced box and
computing the convex hull of their map? If there is an efficient method,
can it be extended to the case of a box intersected with a cone?
Thanks very much for the assistance,
Yaron
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