- #1
tatianaiistb
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Homework Statement
If y=(1,0,0,0) and F4*c=y, find c.
Homework Equations
c=F4-1*y
The Attempt at a Solution
I'm stuck. I don't know how to get F4-1.
F4-1 = (1/N) * [1, 1, 1, 1; 1 -i (-i)^2 (-i)^3; 1 (-i)^2 (-i)^4 (-i)^6; 1 (-i)^3 (-i)^6 (-i)^9] (this is a 4x4 matrix)
N = 4
So I'm confused because from that I get,
(1/4)* [1 1 1 1; 1 -i -1 i; 1 -1 1 -1; 1 i -1 -i]
(this is a 4x4 matrix)
I know that after I get this matrix, I just have to multiply by y to get c, but that inverse matrix has me confused.
Can anyone please help? Thanks!
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