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Oct 15, 2011 at 13:42 comment added Joseph O'Rourke @KC: see her other, apparently related, question, which includes motivation: mathoverflow.net/questions/78204 .
Oct 15, 2011 at 12:28 comment added KConrad Hi Elena. Can you indicate the background which leads you to ask this question, particularly why you are interested in a higher-dimensional analogue?
Oct 15, 2011 at 11:16 history asked Elena Yudovina CC BY-SA 3.0