{
  "annotation_id": "043eab0a-00da-46b5-a2a6-ca062a2cef88",
  "date_created": "2026-03-02T18:01:21.850000Z",
  "date_modified": "2026-03-02T18:01:21.850000Z",
  "file_hash": "b57d85d702d3bdc44386a3215839ea1b0b6a0ca8a95e15522cecbb0d1981a694",
  "private": false,
  "record": {
    "abstract": "A new method of solving the Einstein-Friedmann dynamical equations of a\nspatially homogeneous and isotropic universe is presented. The method is\napplicable when the equation of state of the material content assumes the form\nP=(g -1) rho, g = constant. The solution for the expansion factor is commonly\ngiven only for g = 0, 1 and 4/3 when the curvature index K is 1 or -1. The\nproposed procedure is valid for general g and K and it allows for ease of\nderivation of the solutions. This alternative method is useful pedagogically to\nintroduce basic cosmology.",
    "arxiv_id": "physics/9901006",
    "authors": [
      "Valerio Faraoni"
    ],
    "categories": [
      "physics.class-ph",
      "astro-ph",
      "gr-qc"
    ],
    "doi": "10.1119/1.19361",
    "journal_ref": "Am.J.Phys. 67 (1999) 732",
    "title": "Solving for the dynamics of the universe",
    "url": "https://arxiv.org/abs/physics/9901006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "27e91a73-3daa-4957-b9fe-1eff01a6b338",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}