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when toggle format what by license comment
Mar 28, 2015 at 20:39 answer added user7154 timeline score: 1
Feb 23, 2015 at 10:35 answer added Phoenix87 timeline score: 1
Feb 11, 2015 at 2:20 comment added tamir for instance I see it at Pesking, equation 3.110, page 59 link
Feb 11, 2015 at 2:10 history asked tamir CC BY-SA 3.0