Can you cover your shadows?
Can you cover your shadows?
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你能遮住你的影子吗?
DOI:
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发表时间:
1986
影响因子:
0.8
通讯作者:
P. Mani
中科院分区:
文献类型:
--
作者:
H. Debrunner;P. Mani
A subsetX of thed-dimensional Euclidean space ℝd can cover its shadows inRd, if every orthogonal projection ofX onto a (d−1)-dimensional linear subspace of ℝd is contained in some congruent copy ofX. Whereas every two-dimensional convex discC ⊂Rd has this property, no (d−1)-polytope does, provided thatd>-4.