Equation 88 · Part 2 · A Horizon Is a Toll Booth, Not a Loophole
Symbol E_infty
What this part means
nfty is an input to the expression that computes the quantity on the left.
Its job in the formula
nfty is an input to the expression that computes the quantity on the left.
Full expression→Symbol E_infty→Article meaning
The passage around this formula
Rotating (Kerr) holes complicate the static-observer story: inside the ergosphere, no observer can remain static relative to infinity at all, and a locally nonrotating (ZAMO) observer is instead dragged around the hole at an angular rate fixed by the metric, with a redshift-like relation between locally measured and asymptotic energy that generalizes =/ to the appropriate lapse function of Boyer-Lindquist coordinates [ 13 ] . The ergosphere is also where the Penrose process operates: a particle split inside the ergosphere can send one fragment outward carrying more energy than the original particle possessed, with the deficit paid by the hole’s own rotational…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
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Sources cited in the surrounding passage
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