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Feb 9, 2016 at 19:12 vote accept triplebig
Feb 7, 2016 at 19:27 comment added Sjoerd C. de Vries @drN Good point. I elaborated the answer somewhat.
Feb 7, 2016 at 19:25 history edited Sjoerd C. de Vries CC BY-SA 3.0
added 383 characters in body
Feb 7, 2016 at 19:03 comment added dearN what is the difference with this. In the latter answer, the author did not have to make m a 3D vector. In the current problem, is it the addition of q*E that leads to two matrices that may not be "added" together?
Feb 7, 2016 at 18:51 history answered Sjoerd C. de Vries CC BY-SA 3.0