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1. tananaev · 1790357838 · focus · HN ↗

   I think the box explanation is misleading. There isn't literally a box whose surface you measure. The idea is that the state of a higher-dimensional gravitational system can, in some cases, be completely described by a theory in one fewer dimension.

   1. int_19h · 1790382635 · focus · HN ↗

      For black holes it is quite literal tho.

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