"Euler genus" meaning in English

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  "lang_code": "en",
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      "glosses": [
        "The minimal integer n such that the given graph can be drawn without crossing itself on a sphere with n cross-caps or with n/2 handles."
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          "graph theory",
          "graph theory"
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          "minimal",
          "minimal"
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          "integer",
          "integer"
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        [
          "graph",
          "graph"
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        [
          "sphere",
          "sphere"
        ],
        [
          "cross-cap",
          "cross-cap"
        ],
        [
          "handle",
          "handle"
        ]
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      "raw_glosses": [
        "(graph theory) The minimal integer n such that the given graph can be drawn without crossing itself on a sphere with n cross-caps or with n/2 handles."
      ],
      "topics": [
        "graph-theory",
        "mathematics",
        "sciences"
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  "word": "Euler genus"
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        "The minimal integer n such that the given graph can be drawn without crossing itself on a sphere with n cross-caps or with n/2 handles."
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          "graph theory",
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        "(graph theory) The minimal integer n such that the given graph can be drawn without crossing itself on a sphere with n cross-caps or with n/2 handles."
      ],
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        "graph-theory",
        "mathematics",
        "sciences"
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