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Black holes: from event horizons to trapping horizons - LUTH ...

Black holes: from event horizons to trapping horizons - LUTH ...

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Local approaches <strong>to</strong> black <strong>holes</strong><br />

Foliation of a hypersurface by spacelike 2-surfaces<br />

hypersurface H = submanifold of<br />

spacetime ⎧(M<br />

, g) of codimension 1<br />

⎨ spacelike<br />

H can be null<br />

⎩<br />

timelike<br />

H = <br />

t∈R<br />

St<br />

St = spacelike 2-surface<br />

⇐= 3+1 perspective<br />

Eric Gourgoulhon (<strong>LUTH</strong>) <strong>Black</strong> <strong>holes</strong>: <strong>trapping</strong> <strong>horizons</strong> CERN, 17 March 2010 17 / 38

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