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by antidesitter 2626 days ago
> A black hole itself (the singularity) is 1 dimensional - a single infinitesimal point.

A point is 0-dimensional. A line is 1-dimensional.

The singularity is 1-dimensional (more precisely, a ring) if the black hole is rotating. [1]

[1] https://en.wikipedia.org/wiki/Ring_singularity