"Kirby calculus" meaning in English

{
  "etymology_text": "After Robion Kirby (born 1938), American topologist.",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A method in geometric topology for modifying framed links in the 3-sphere using a finite set of moves (the Kirby moves)."
      ],
      "id": "en-Kirby_calculus-en-noun-8K149SPW",
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        [
          "framed link",
          "framed link"
        ],
        [
          "sphere",
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          "finite",
          "finite"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A method in geometric topology for modifying framed links in the 3-sphere using a finite set of moves (the Kirby moves)."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "mathematics",
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        "Kirby calculus",
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  "word": "Kirby calculus"
}

{
  "etymology_text": "After Robion Kirby (born 1938), American topologist.",
  "head_templates": [
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      "expansion": "Kirby calculus (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A method in geometric topology for modifying framed links in the 3-sphere using a finite set of moves (the Kirby moves)."
      ],
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          "mathematics",
          "mathematics"
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        [
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          "sphere",
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      "raw_glosses": [
        "(mathematics) A method in geometric topology for modifying framed links in the 3-sphere using a finite set of moves (the Kirby moves)."
      ],
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        "uncountable"
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  "word": "Kirby calculus"
}