"additive function" meaning in English

{
  "forms": [
    {
      "form": "additive functions",
      "tags": [
        "plural"
      ]
    }
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  "head_templates": [
    {
      "args": {},
      "expansion": "additive function (plural additive functions)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Functions",
          "orig": "en:Functions",
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            "Calculus",
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            "Mathematical analysis",
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        }
      ],
      "glosses": [
        "A unary function that preserves the addition operation; a unary function f such that for any x and y: f(x + y) = f(x) + f(y)."
      ],
      "hypernyms": [
        {
          "word": "function"
        }
      ],
      "hyponyms": [
        {
          "word": "subadditive function"
        },
        {
          "word": "superadditive function"
        }
      ],
      "id": "en-additive_function-en-noun-ETCq3rNj",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "function",
          "function"
        ],
        [
          "addition",
          "addition"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A unary function that preserves the addition operation; a unary function f such that for any x and y: f(x + y) = f(x) + f(y)."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "additiivinen funktio"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "additive Funktion"
        }
      ],
      "wikipedia": [
        "additive function"
      ]
    }
  ],
  "word": "additive function"
}

{
  "forms": [
    {
      "form": "additive functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "additive function (plural additive functions)",
      "name": "en-noun"
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  "hypernyms": [
    {
      "word": "function"
    }
  ],
  "hyponyms": [
    {
      "word": "subadditive function"
    },
    {
      "word": "superadditive function"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "en:Functions",
        "en:Mathematics"
      ],
      "glosses": [
        "A unary function that preserves the addition operation; a unary function f such that for any x and y: f(x + y) = f(x) + f(y)."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "function",
          "function"
        ],
        [
          "addition",
          "addition"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A unary function that preserves the addition operation; a unary function f such that for any x and y: f(x + y) = f(x) + f(y)."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "additive function"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "additiivinen funktio"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "additive Funktion"
    }
  ],
  "word": "additive function"
}