Penrose's singularity theorem and the Kerr space-time
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arXiv
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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914172108800000 |
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| author | Brook, Jonathan Stevens, Chris |
| author_facet | Brook, Jonathan Stevens, Chris |
| contents | In this short paper, Penrose's famous singularity theorem is applied to the Kerr space-time. In the case of the maximally extended space-time, the assumptions of Penrose's singularity theorem are not satisfied as the space-time is not globally hyperbolic. In the case of the unextended space-time -- defined up to some radius between the inner and outer event horizons -- the assumptions of the theorem hold, but scalar curvature invariants remain finite everywhere. Calculations are done in detail showcasing the validity of the theorem, and misconceptions regarding the characterization of physical singularities by incomplete null geodesics are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04674 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Penrose's singularity theorem and the Kerr space-time Brook, Jonathan Stevens, Chris General Relativity and Quantum Cosmology In this short paper, Penrose's famous singularity theorem is applied to the Kerr space-time. In the case of the maximally extended space-time, the assumptions of Penrose's singularity theorem are not satisfied as the space-time is not globally hyperbolic. In the case of the unextended space-time -- defined up to some radius between the inner and outer event horizons -- the assumptions of the theorem hold, but scalar curvature invariants remain finite everywhere. Calculations are done in detail showcasing the validity of the theorem, and misconceptions regarding the characterization of physical singularities by incomplete null geodesics are discussed. |
| title | Penrose's singularity theorem and the Kerr space-time |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2504.04674 |