"∞̃" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Symboles en conventions internationales",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Signe de l’infini ∞ avec le diacritique tilde ◌̃."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en conventions internationales des mathématiques",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Eric W. Weisstein, « Complex Infinity », MathWorld",
          "text": "Complex infinity is an infinite number in the complex plane whose complex argument is unknown or undefined. Complex infinity may be returned by the Wolfram Language, where it is represented symbolically by ComplexInfinity. The Wolfram Functions Site uses the notation ∞̃ to represent complex infinity."
        }
      ],
      "glosses": [
        "Infini complexe."
      ],
      "id": "fr-∞̃-conv-symbol-oO8ZPLa8",
      "topics": [
        "mathematics"
      ]
    }
  ],
  "word": "∞̃"
}

{
  "categories": [
    "Symboles en conventions internationales",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Signe de l’infini ∞ avec le diacritique tilde ◌̃."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "symbol",
  "pos_title": "Symbole",
  "senses": [
    {
      "categories": [
        "Lexique en conventions internationales des mathématiques"
      ],
      "examples": [
        {
          "ref": "Eric W. Weisstein, « Complex Infinity », MathWorld",
          "text": "Complex infinity is an infinite number in the complex plane whose complex argument is unknown or undefined. Complex infinity may be returned by the Wolfram Language, where it is represented symbolically by ComplexInfinity. The Wolfram Functions Site uses the notation ∞̃ to represent complex infinity."
        }
      ],
      "glosses": [
        "Infini complexe."
      ],
      "topics": [
        "mathematics"
      ]
    }
  ],
  "word": "∞̃"
}