"Heesch's problem" meaning in English

{
  "etymology_text": "Named after geometer Heinrich Heesch.",
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      "expansion": "Heesch's problem",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "kind": "topical",
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          "name": "Geometry",
          "orig": "en:Geometry",
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            "Fundamental"
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      ],
      "glosses": [
        "The mathematical problem of determining the set of numbers that can be Heesch numbers."
      ],
      "id": "en-Heesch's_problem-en-name-IzL7j7PP",
      "links": [
        [
          "geometry",
          "geometry"
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        [
          "set",
          "set"
        ],
        [
          "Heesch number",
          "Heesch number"
        ]
      ],
      "raw_glosses": [
        "(geometry) The mathematical problem of determining the set of numbers that can be Heesch numbers."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Heesch's problem",
        "Heinrich Heesch"
      ]
    }
  ],
  "word": "Heesch's problem"
}

{
  "etymology_text": "Named after geometer Heinrich Heesch.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Heesch's problem",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
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        "English uncountable nouns",
        "Pages with 1 entry",
        "en:Geometry"
      ],
      "glosses": [
        "The mathematical problem of determining the set of numbers that can be Heesch numbers."
      ],
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "set",
          "set"
        ],
        [
          "Heesch number",
          "Heesch number"
        ]
      ],
      "raw_glosses": [
        "(geometry) The mathematical problem of determining the set of numbers that can be Heesch numbers."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "Heesch's problem",
        "Heinrich Heesch"
      ]
    }
  ],
  "word": "Heesch's problem"
}