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Jan 26 at 18:53 comment added Michael Levy what do the $\left|\right|$ symbols mean here? My sense is that they mean cardinality. Please advise.
Jun 10, 2017 at 3:26 history tweeted twitter.com/StackPhysics/status/873380733313798144
Jun 9, 2017 at 22:53 answer added user8153 timeline score: 1
Jun 9, 2017 at 17:09 answer added user126422 timeline score: 0
Jun 9, 2017 at 11:42 review First posts
Jun 9, 2017 at 12:29
Jun 9, 2017 at 11:36 history asked Coriolis1 CC BY-SA 3.0