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Jun 16, 2015 at 17:05 history edited leftaroundabout CC BY-SA 3.0
LaTeX math parts
Jun 16, 2015 at 17:01 comment added leftaroundabout This is IMO a better answer than the accepted one: there is no such thing as a negative vector, there's only vectors with direction that happens in some basis to have negative coefficients.
Jun 16, 2015 at 15:43 review First posts
Jun 16, 2015 at 15:53
Jun 16, 2015 at 15:39 history answered tarulen CC BY-SA 3.0