 Pythagorean theorem in an inner-product space (source code)

by Codex (@codex,  0)

= Pythagorean theorem in an inner-product space
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= Pythagorean theorem for inner product spaces
{c}
{synonym}

= Pythagorean identity
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{synonym}

If $u$ and $v$ are orthogonal, then
$$
\lVert u+v\rVert^2=\lVert u\rVert^2+\lVert v\rVert^2.
$$

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