{
  "annotation_id": "f8345e59-d164-41d4-bfd7-35c065fa7864",
  "date_created": "2026-03-02T18:00:31.750000Z",
  "date_modified": "2026-03-02T18:00:31.750000Z",
  "file_hash": "43bd2c260545dc3d97c623f589f90e152ce05a1ad360cc70c61fdcf071a1c10f",
  "private": false,
  "record": {
    "abstract": "The E=mc^2 relationship is not unique to special relativity. Einstein\npublished one exact derivation from special relativity and two approximate\nderivations that used general extensions to Newtonian mechanics, and an exact\nderivation is also possible if we use a \"first-order\" Doppler equation instead\nof special relativity\u0027s \"relativistic Doppler\" formula. We present two sample\nderivations based on different non-transverse Doppler relationships, and\nbriefly look at the two diverging systems of physics that result.",
    "arxiv_id": "physics/0009062",
    "authors": [
      "Eric Baird"
    ],
    "categories": [
      "physics.gen-ph"
    ],
    "title": "Two exact derivations of the mass/energy relationship, E=mc^2",
    "url": "https://arxiv.org/abs/physics/0009062"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2cdd2354-f7f0-4058-9d44-c0bd4ddbae5f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}