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Apr 13, 2017 at 12:57 history edited CommunityBot
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May 4, 2016 at 20:41 vote accept Peter Dukes
May 4, 2016 at 13:27 answer added Ilya Bogdanov timeline score: 2
Apr 30, 2016 at 3:00 comment added Peter Dukes Please see my last paragraph. If you adjust Elkies' example to have constant column sum, it fails to have large inverse. The inverse of the circulant has all entries less than one in absolute value. Indeed, being a multiple of a stochastic matrix, we would expect small column sums in the inverse.
Apr 30, 2016 at 1:35 comment added Christian Remling The counterexample in the question you linked to is very close to having constant column sums, so it's clear that this condition can't help.
Apr 29, 2016 at 23:16 history edited Peter Dukes CC BY-SA 3.0
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Apr 29, 2016 at 22:24 history edited Peter Dukes CC BY-SA 3.0
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Apr 29, 2016 at 22:17 history asked Peter Dukes CC BY-SA 3.0