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  "record": {
    "abstract": "This paper has been withdrawn by the authors because the paper is largely\nrevised and improved, and to appear in Mechanics Research Communications.",
    "arxiv_id": "physics/9903014",
    "authors": [
      "Y. C. Huang",
      "Z. X. Liu",
      "X. G. Li"
    ],
    "categories": [
      "physics.class-ph"
    ],
    "journal_ref": "This paper had been largely improved and had been published in\n  Mechanics Research Communications, 30 (2003)567-572.",
    "title": "Unified Expressions Of All Differential Variational Principles",
    "url": "https://arxiv.org/abs/physics/9903014"
  },
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  "source": {
    "execution_id": "fc378f57-6b48-44ce-ada6-b16f83666e38",
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    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}