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Equation 77 · Part 1 · A Reference Frame Becomes Classical by Publishing Its Orientation

Symbol j

jj
jj

What this part means

j is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

j is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

Let J\mathbf J be the spin- j angular-momentum operator and σ(n)\boldsymbol\sigma^{(n)} the Pauli vector for probe n . A candidate rotationally invariant interaction is

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Learn the underlying idea

A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.

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