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Equation 55 · Part 1 · The Entry a Relabeling Cannot Write

Symbol G

GG
GG

What this part means

G 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

G 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

…under a conservation-relevant group action, without being the identity, is and is not entitled to conserve. Cirstoiu, Korzekwa, and Jennings addressed exactly that question for quantum channels invariant under a group G associated with a Noether charge, asking how far a G -symmetric but non-unitary channel can still deviate from conserving the associated quantity [ 1 ] . Their answer bounds that deviation, over the whole convex set of symmetric channels, by how far a given channel sits from being a closed,…

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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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