Equation 11 · The Atlas That Refuses to Close
What does this equation mean?
Read the formula alongside the article passage below. Each part has a deeper page with its role in the equation, the supporting passage and nearby citations.
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.
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Symbol u
u is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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What the article says around this equation
Naming the slice is the first entry in this atlas’s notation. Let be a spacelike hypersurface and the four-velocity of the observer whose notion of simultaneity represents, with taken orthogonal to u . Replace the discrete sum with the body’s stress-energy tensor and define the energy centroid
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