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Equation 11 · Part 1 · The Bend an Elevator Cannot Fake

Symbol phi

ϕ(x):=ln⁡U(x)\phi(\mathbf x) := \ln U(\mathbf x)
ϕ\phi

What this part means

phi is part of the quantity the equation computes from the expression on the right.

Its job in the formula

phi is part of the quantity the equation computes from the expression on the right.

The passage around this formula

…own location, so a network’s fitted node potential can be compared against a measurement made over any convenient physical route without first specifying which route was used. Define the dimensionless node potential ϕ(x)\phi(\mathbf x) := ln⁡\ln U(x\mathbf x) and the edge observable actually recorded between linked clocks i and j ,

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Learn the underlying idea

A function assigns an output to each allowed input. The expression f(x) means “apply f to x”.

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