{
  "annotation_id": "0234fc21-3471-4135-851c-bb0d1dff2c28",
  "date_created": "2026-03-02T18:00:35.795000Z",
  "date_modified": "2026-03-02T18:00:35.795000Z",
  "file_hash": "470d5f54f61d3deaf6926ae1b965e85bc199f3efaa1e1d6503013e20a66a9fc5",
  "private": false,
  "record": {
    "abstract": "We define 1+1 dimensional de Sitter manifold in this paper and we consider\nvarious coordinate systems on it. Some interesting aspects of the general\ntheory of relativity are demonstrated by using the transformations between the\nconsidered coordinate systems. The problem might be of interest for physics and\nmathematics students as well as for physics teachers.",
    "arxiv_id": "physics/0107074",
    "authors": [
      "Michal Demetrian"
    ],
    "categories": [
      "physics.ed-ph",
      "physics.gen-ph"
    ],
    "title": "How to Introduce A World Time to A Part of Two Dimensional de Sitter   Manifold",
    "url": "https://arxiv.org/abs/physics/0107074"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "557c2051-e1bc-4868-a203-f86bec843fc7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}