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Equation 112 · Part 3 · The Bit Comes Back Before the Bearing

Symbol delta

ΔtLG(ϵ,δ)  ≡  tG(δ)−tL(ϵ),\Delta t_{LG}(\epsilon,\delta) \;\equiv\; t_G(\delta) - t_L(\epsilon),
δ\delta

What this part means

delta 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

delta 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

…problem entirely, since the superselection rule stops restricting what the decoding party can effectively do, and again tGt_G →\to tLt_L [ 11 ] . Both limits are known theory, not new claims, and both are required checks on Δ\Delta tLGt_{LG} rather than optional flourishes: an object that failed to collapse to the established result in either limit would not be trustworthy in the regime where the two differ.

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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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Sources cited in the surrounding passage

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