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The following notation is from the book "Frames and Bases."
Let f and g be vectors in R^{n} with the usual dot product <,>.
Then, what does the notation \left|\left\langle f,g\right\rangle\right|^{2} mean?
Specifically, does it mean \left|\sum^{n}_{i=1}f_{i} g_{i}\right|
or does it mean \left(\sum^{n}_{i=1}f_{i} g_{i}\right)^{2}
Let f and g be vectors in R^{n} with the usual dot product <,>.
Then, what does the notation \left|\left\langle f,g\right\rangle\right|^{2} mean?
Specifically, does it mean \left|\sum^{n}_{i=1}f_{i} g_{i}\right|
or does it mean \left(\sum^{n}_{i=1}f_{i} g_{i}\right)^{2}
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