{
  "aliases": null,
  "backlinks": [
    {
      "field": "uses",
      "target": "01VN79T2PR"
    },
    {
      "field": "uses",
      "target": "079EGSD32Y"
    },
    {
      "field": "uses",
      "target": "0JNCBFMPXR"
    },
    {
      "field": "uses",
      "target": "0N3WFZEFPM"
    }
  ],
  "body": "\n## Definition\n\nA complex number $\\alpha$ is algebraic if there is a nonzero polynomial $f$ with rational coefficients such that $f(\\alpha) = 0$.\nThe degree of $\\alpha$ is the smallest degree of such a polynomial.\n\n## Remarks\n\nOne may use integer coefficients instead, by clearing denominators.\nExamples are each rational number (degree $1$), $\\sqrt{2}$ and $i$ (degree $2$), and $\\sqrt[3]{2}$ (degree $3$).\nThe algebraic numbers form a field, and this field is countable.\nA complex number that is not algebraic is [[transcendental|079EGSD32Y]].\n\n## Explanations\n\n### L1 human\n\nAn algebraic number is a solution of a polynomial equation with integer coefficients.\nFor example, $\\sqrt{2}$ is algebraic because it solves $x^2 - 2 = 0$.\n",
  "commit": "f591989ed15704e9d8755a7a5a6426d73de7a3ae",
  "front": {
    "defines": "0MNF0BYFQC",
    "kind": "definition",
    "msc": [
      "11R04"
    ],
    "name": "Algebraic number",
    "sources": [
      {
        "locator": "lead section",
        "url": "https://en.wikipedia.org/wiki/Algebraic_number"
      }
    ],
    "tag": "0MB4TGMXG6"
  },
  "kind": "definition",
  "link": "https://math2.tamnd.com/node/0MB4TGMXG6/",
  "links": [
    {
      "field": "defines",
      "target": "0MNF0BYFQC"
    }
  ],
  "markdown": "https://math2.tamnd.com/node/0MB4TGMXG6.md",
  "msc": [
    "11R04"
  ],
  "name": "Algebraic number",
  "prov": null,
  "role": "",
  "source": "https://github.com/tamnd/math2/blob/main/nodes/0MB/0MB4TGMXG6.md",
  "status": null,
  "tag": "0MB4TGMXG6",
  "uri": "m2://0MB4TGMXG6",
  "url": "https://math2.tamnd.com/wiki/algebraic-number-definition/",
  "writing": {
    "tag": "0MB4TGMXG6",
    "kind": "definition",
    "level": "W1",
    "next": [
      {
        "what": "edge instance_of in",
        "note": "one example",
        "have": 0,
        "want": 1
      },
      {
        "what": "edge not_instance_of in",
        "note": "one non-example that fails one clause",
        "have": 0,
        "want": 1
      }
    ]
  }
}
