"位相幾何学" meaning in Japanese

{
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        "2": "位相",
        "3": "幾何学",
        "t1": "phase",
        "t2": "geometry",
        "tr1": "isō",
        "tr2": "kikagaku"
      },
      "expansion": "位相 (isō, “phase”) + 幾何学 (kikagaku, “geometry”)",
      "name": "af"
    }
  ],
  "etymology_text": "From 位相 (isō, “phase”) + 幾何学 (kikagaku, “geometry”).",
  "forms": [
    {
      "form": "位相幾何学 ^",
      "ruby": [
        [
          "位",
          "い"
        ],
        [
          "相",
          "そう"
        ],
        [
          "幾",
          "き"
        ],
        [
          "何",
          "か"
        ],
        [
          "学",
          "がく"
        ]
      ],
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    },
    {
      "form": "isō kikagaku",
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        "romanization"
      ]
    },
    {
      "form": "wisaukikagaku",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ゐさうきかがく",
      "roman": "wisaukikagaku",
      "tags": [
        "hiragana",
        "historical"
      ]
    },
    {
      "form": "位相幾何學",
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        "kanji",
        "kyūjitai"
      ]
    }
  ],
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      "name": "ja-noun"
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  "lang_code": "ja",
  "pos": "noun",
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          "name": "Topology",
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      "glosses": [
        "topology (study of geometric properties that are not changed by stretching etc.)"
      ],
      "id": "en-位相幾何学-ja-noun-DHUK~RXx",
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          "topology",
          "topology"
        ]
      ],
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  ],
  "sounds": [
    {
      "other": "いそーきかがく"
    },
    {
      "ipa": "[iso̞ː kʲi̥ka̠ɡa̠kɯ̟]"
    }
  ],
  "word": "位相幾何学"
}

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      "name": "af"
    }
  ],
  "etymology_text": "From 位相 (isō, “phase”) + 幾何学 (kikagaku, “geometry”).",
  "forms": [
    {
      "form": "位相幾何学 ^",
      "ruby": [
        [
          "位",
          "い"
        ],
        [
          "相",
          "そう"
        ],
        [
          "幾",
          "き"
        ],
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          "何",
          "か"
        ],
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          "学",
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      "form": "isō kikagaku",
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      "other": "いそーきかがく"
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      "ipa": "[iso̞ː kʲi̥ka̠ɡa̠kɯ̟]"
    }
  ],
  "word": "位相幾何学"
}