"grad" meaning in 記号

{
  "categories": [
    {
      "kind": "other",
      "name": "数学記号",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "記号",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "記号",
  "lang_code": "unknown",
  "notes": [
    "スカラー場 f(x_1,x_2,⋯x_n) に対して、gradf と記して、gradf=((∂f)/(∂x_1),(∂f)/(∂x_2),⋯,(∂f)/(∂x_n)) を意味する。"
  ],
  "pos": "symbol",
  "pos_title": "数学記号",
  "senses": [
    {
      "glosses": [
        "スカラー場の勾配を意味する演算子。「∇」に同じ。"
      ],
      "id": "ja-grad-unknown-symbol-zuDTz2uz"
    }
  ],
  "word": "grad"
}

{
  "categories": [
    "数学記号",
    "記号"
  ],
  "lang": "記号",
  "lang_code": "unknown",
  "notes": [
    "スカラー場 f(x_1,x_2,⋯x_n) に対して、gradf と記して、gradf=((∂f)/(∂x_1),(∂f)/(∂x_2),⋯,(∂f)/(∂x_n)) を意味する。"
  ],
  "pos": "symbol",
  "pos_title": "数学記号",
  "senses": [
    {
      "glosses": [
        "スカラー場の勾配を意味する演算子。「∇」に同じ。"
      ]
    }
  ],
  "word": "grad"
}

{
  "called_from": "extractor/ja/page/parse_section/93",
  "msg": "Unknown section: 関連記号",
  "path": [
    "grad"
  ],
  "section": "記号",
  "subsection": "",
  "title": "grad",
  "trace": ""
}