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Sep 16, 2015 at 7:41 vote accept ilhano
Sep 15, 2015 at 12:57 comment added Xi'an The matrix equation is $\pi P=\pi$, not $P \pi=\pi$.
Sep 15, 2015 at 11:19 answer added Christoph Hanck timeline score: 2
Sep 15, 2015 at 10:32 review First posts
Sep 15, 2015 at 10:41
Sep 15, 2015 at 10:30 history asked ilhano CC BY-SA 3.0