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when toggle format what by license comment
Oct 27, 2022 at 15:14 answer added wlad timeline score: 1
Dec 31, 2011 at 3:59 vote accept Victor Liu
Dec 28, 2011 at 11:27 answer added Alexander Chervov timeline score: 0
Dec 28, 2011 at 8:21 comment added Alexander Chervov But why you write about 2x2 blocks in indefinite case ? Usually just elements of D can be taken negative.
Dec 28, 2011 at 8:18 comment added Alexander Chervov I was always wondering the same :) Great question.
Dec 28, 2011 at 1:05 answer added Igor Rivin timeline score: 4
Dec 27, 2011 at 23:21 history asked Victor Liu CC BY-SA 3.0