September 28th, 2014, 11:09 AM  #1 
Member Joined: Sep 2014 From: UK Posts: 31 Thanks: 1  Vector projection
I was wondering if anyone could provide a written proof of the fact that Proj_u(proj_u(v))= proj_u(v)? I know why this is geometrically and I devised a proof myself, but it ended up with a constant in it. 

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projection, vector 
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