"superdiagonal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "super",
        "3": "diagonal"
      },
      "expansion": "super- + diagonal",
      "name": "prefix"
    }
  ],
  "etymology_text": "super- + diagonal",
  "forms": [
    {
      "form": "superdiagonals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superdiagonal (plural superdiagonals)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "kind": "other",
          "name": "English terms prefixed with super-",
          "parents": [],
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
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            "Formal sciences",
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      ],
      "examples": [
        {
          "ref": "2016, Eric Evert, J. William Helton, Igor Klep, Scott McCullough, “Circular Free Spectrahedra”, in arXiv",
          "text": "We classify all free spectrahedra that are circular, that is, closed under multiplication by exp(i t): up to unitary equivalence, the coefficients of a minimal LMI defining a circular free spectrahedron have a common block decomposition in which the only nonzero blocks are on the superdiagonal.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The diagonal of a matrix that lies directly above and to the right of the main diagonal."
      ],
      "id": "en-superdiagonal-en-noun-VbGR6Z-o",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "diagonal",
          "diagonal"
        ],
        [
          "matrix",
          "matrix"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The diagonal of a matrix that lies directly above and to the right of the main diagonal."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "superdiagonal"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "super",
        "3": "diagonal"
      },
      "expansion": "super- + diagonal",
      "name": "prefix"
    }
  ],
  "etymology_text": "super- + diagonal",
  "forms": [
    {
      "form": "superdiagonals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superdiagonal (plural superdiagonals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
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      "examples": [
        {
          "ref": "2016, Eric Evert, J. William Helton, Igor Klep, Scott McCullough, “Circular Free Spectrahedra”, in arXiv",
          "text": "We classify all free spectrahedra that are circular, that is, closed under multiplication by exp(i t): up to unitary equivalence, the coefficients of a minimal LMI defining a circular free spectrahedron have a common block decomposition in which the only nonzero blocks are on the superdiagonal.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The diagonal of a matrix that lies directly above and to the right of the main diagonal."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "diagonal",
          "diagonal"
        ],
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          "matrix",
          "matrix"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The diagonal of a matrix that lies directly above and to the right of the main diagonal."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "superdiagonal"
}