John Carlos Baez on Nostr: In general relativity, a point mass just sitting there is inevitably a black hole. ...

In general relativity, a point mass just sitting there is inevitably a black hole. But that's when you're living in 3d space (and one dimension of time). In 2d space, a point mass creates a less drastic singularity: a 'cone point'. I've been studying these cone points lately, just for fun.

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