{
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  "date_created": "2026-03-02T18:01:11.446000Z",
  "date_modified": "2026-03-02T18:01:11.446000Z",
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  "record": {
    "abstract": "General relativity includes geometrical optics. This basic fact has relevant\nconsequences that concern the physical meaning of the discontinuity surfaces\npropagated in the gravitational field - as it was first emphasized by\nLevi-Civita.",
    "arxiv_id": "physics/0609161",
    "authors": [
      "A. Loinger"
    ],
    "categories": [
      "physics.gen-ph"
    ],
    "title": "Geometrical optics in general relativity",
    "url": "https://arxiv.org/abs/physics/0609161"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "941bbe32-8602-4eb3-baa9-b3b181d16c4b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}