Equation 41 · Part 1 · A Horizon Is a Toll Booth, Not a Loophole
Symbol f
What this part means
f is part of the quantity the equation computes from the expression on the right.
Its job in the formula
f is part of the quantity the equation computes from the expression on the right.
Full expression→Symbol f→Article meaning
The passage around this formula
d t , with f(r) = 1-2GM/(r) for Schwarzschild. A locally conserved (Killing) energy — the energy the same quantity would be assigned by a distant static observer — and the energy measured by the local static observer, , are related by the standard blueshift-on-the-way-down relation
Learn the underlying idea
A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.
Open the illustrated functions: inputs become outputs guide →
See this notation across published equations →
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