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Equation 4 · A Reference Frame Becomes Classical by Publishing Its Orientation

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δ\delta

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the failure no greater than. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.

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δ\delta

Symbol delta

the failure no greater than.

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I call the proposed quantity group-valued record redundancy . For accuracy ϵ\epsilon and failure probability δ\delta , it counts the largest number of disjoint environment fragments from which covariant measurements can independently estimate the same relational orientation within ϵ\epsilon , with failure no greater than δ\delta . “Covariant” means a change of reference frame rotates the state, the measurement outcomes, and the reported estimate together; it cannot change whether the estimate was successful.

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