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Equation 2 · Part 1 · The Clock That Comes Back Wrong by Exactly Its Mass

Symbol L

L\mathcal L
LL

What this part means

L 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

L 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

Call a frame loop L\mathcal L any sequence of symmetry operations — translations, boosts, elapsed proper time — whose net classical effect, read off the group’s own parameters, is the identity. Two such loops carry this paper.

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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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Sources cited in the article section

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