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Dec 5, 2018 at 20:01 history edited YCor CC BY-SA 4.0
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Dec 30, 2013 at 9:37 comment added Gil Kalai The question is not clear. What do you assume on Q? is it a convex hull of some vertices of P?
Mar 28, 2012 at 19:34 comment added Joseph O'Rourke This does not answer your question, but Grünbaum's book Convex Polytopes indicates (p.129b) that it is an open problem whether there exists any polytope other than a simplex that is 2-neighborly and its dual is 2-neighborly.
Mar 28, 2012 at 19:07 history asked mmaann CC BY-SA 3.0