Compute <z,w>: Formula & Result

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SUMMARY

The discussion focuses on computing the complex inner product for the vectors z = [(1+i)/2, (1-i)/2] and w = [i/sqrt(2), -1/sqrt(2)]. The formula used is = z1 * w1 + 2 * z2 * w2, where w1 and w2 are conjugated. The computed result is -sqrt(2)/4 + sqrt(2)/4 * i. The validity of the formula used is questioned, particularly the inclusion of the factor of 2.

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Homework Statement



Compute <z,w> for z = [ (1+i)/2 , (1-i)/2 ], w = [ i/sqrt(2) , -1/sqrt(2) ]

2. Equations

<z , w> = z1 * w1 + 2 * z2 * w2

where w1 and w2 have the conjugate sign over them.

The Attempt at a Solution




<z, w> = (1+i)/2 * (-i/sqrt(2)) + 2 * ((1-i)/2) (-1/sqrt(2))

= -sqrt(2)/4 + sqrt(2)/4 * i


Is the formula I used correct for this? Thanks!
 
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Hi Squaremeplease

I'm not sure what your formula is or why there is a 2 in it... did your formula come from somewhere, or are you supposed to use it for some reason?

the usual complex inner product is defined as
[tex]<u,v> = \sum u_i v_i*[/tex]
 

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