Can someone please help me figure out the projection for this?
projw x, where x = (1,2,0,-1) W is the subspace of R^4 spanned by the vectors.
v1 = (1/2,1/2,1/2,1/2)
v2 = (1/2,1/2,-1/2,-1/2)
v3 = (1/2,-1/2,1/2,-1/2)
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can you elaborate more on the 3rd line?
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