http://upload.wikimedia.org/math/7/7...8706d780f6.png

What do the two lines on each side of the vectors mean?

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- September 20th 2009, 04:01 PMsdmcin11Simple question about angle between two vectors
http://upload.wikimedia.org/math/7/7...8706d780f6.png

What do the two lines on each side of the vectors mean? - September 20th 2009, 04:17 PMhairymclairy
They mean the absolute value of u and v i.e, u and v are non-negative.

- September 20th 2009, 05:07 PMKrizalid
those aren't absolute values, those are norms.

See

http://en.wikipedia.org/wiki/Norm_(mathematics) - September 20th 2009, 05:11 PMhairymclairy
Indeed, apparently im a bit rusty on the old geometry.