Levi-Civita and Palatini showed that a unique symmetric linear connection can be recovered from a metric tensor alone via the Christoffel symbols without any auxiliary gauge field.
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Palatini(as a historical figure in differential geometry)
An Italian mathematician (Attilio Palatini, 1889-1949) who worked on the mathematics of curved spacetime and gravity.
Symmetric linear connection(as used in differential geometry)
A comparison rule for directions in curved space that works the same way no matter which direction you're moving, with no twisting or rotation built in.
metric tensor(in physics and geometry)
A mathematical tool that describes how to measure distances and angles in space. Think of it as a set of rules that tells you how space is shaped.