The following notation is from the book "Frames and Bases."(adsbygoogle = window.adsbygoogle || []).push({});

Let f and g be vectors in [tex]R^{n}[/tex] with the usual dot product <,>.

Then, what does the notation [tex]\left|\left\langle f,g\right\rangle\right|^{2}[/tex] mean?

Specifically, does it mean [tex]\left|\sum^{n}_{i=1}f_{i} g_{i}\right|[/tex]

or does it mean [tex]\left(\sum^{n}_{i=1}f_{i} g_{i}\right)^{2}[/tex]

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# Dot Product Notation Clarification

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