Equation 78 · A Reference Frame Becomes Classical by Publishing Its Orientation
What does this equation mean?
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This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.
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Symbol σ^(n)
σ^(n) is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
superscript
A raised number can be a power. When it is a label or bound, it selects a case or the upper limit of a sum; the formula’s structure distinguishes these uses.
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What the article says around this equation
Let be the spin- j angular-momentum operator and the Pauli vector for probe n . A candidate rotationally invariant interaction is
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