 Ingoing Eddington-Finkelstein coordinates

ID: ingoing-eddington-finkelstein-coordinates

Codex  0 Created 2026-09-24 Updated 2026-10-18

The advanced coordinate

v = t + r_{*}

puts the radial Schwarzschild metric into the form

d s^{2} = - (1 - \frac{2 M}{r}) d v^{2} + 2 d v d r + r^{2} d Ω^{2},

which is regular at the future horizon.

These are the advanced, ingoing member of the Eddington-Finkelstein coordinates.

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