"direct sum" meaning in All languages combined

See direct sum on Wiktionary

Noun [English]

Forms: direct sums [plural]
Head templates: {{en-noun}} direct sum (plural direct sums)
  1. (mathematics) coproduct in some categories, like abelian groups, topological spaces or modules Translations (coproduct in some categories): suora summa (Finnish), suma prosta [feminine] (Polish)
    Sense id: en-direct_sum-en-noun-JInnkFvg Categories (other): Mathematics, English entries with incorrect language header, Entries with translation boxes, Pages with 1 entry, Pages with entries, Terms with Finnish translations, Terms with Polish translations Disambiguation of English entries with incorrect language header: 43 33 24 Disambiguation of Entries with translation boxes: 39 38 22 Disambiguation of Pages with 1 entry: 45 31 24 Disambiguation of Pages with entries: 45 31 24 Disambiguation of Terms with Finnish translations: 40 33 27 Disambiguation of Terms with Polish translations: 40 32 28 Topics: mathematics, sciences Disambiguation of 'coproduct in some categories': 77 16 7
  2. (linear algebra) A linear sum in which the intersection of the summands has dimension zero. Equivalently, a linear sum of two subspaces, any vector of which can be expressed uniquely as a sum of two vectors: one vector belonging to the first subspace, and the other vector belonging to the second subspace.
    Sense id: en-direct_sum-en-noun-Quf2YWdA Categories (other): Linear algebra, Entries with translation boxes, Terms with Finnish translations, Terms with Polish translations Disambiguation of Entries with translation boxes: 39 38 22 Disambiguation of Terms with Finnish translations: 40 33 27 Disambiguation of Terms with Polish translations: 40 32 28 Topics: linear-algebra, mathematics, sciences
  3. (linear algebra) A block diagonal matrix interpreted as having its non-zero blocks (which are square matrices) as summands.
    Sense id: en-direct_sum-en-noun-BBvcrCmP Categories (other): Linear algebra, Entries with translation boxes, Terms with Finnish translations, Terms with Polish translations Disambiguation of Entries with translation boxes: 39 38 22 Disambiguation of Terms with Finnish translations: 40 33 27 Disambiguation of Terms with Polish translations: 40 32 28 Topics: linear-algebra, mathematics, sciences

Inflected forms

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          "_dis1": "77 16 7",
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          "sense": "coproduct in some categories",
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        "A linear sum in which the intersection of the summands has dimension zero. Equivalently, a linear sum of two subspaces, any vector of which can be expressed uniquely as a sum of two vectors: one vector belonging to the first subspace, and the other vector belonging to the second subspace."
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        "(linear algebra) A linear sum in which the intersection of the summands has dimension zero. Equivalently, a linear sum of two subspaces, any vector of which can be expressed uniquely as a sum of two vectors: one vector belonging to the first subspace, and the other vector belonging to the second subspace."
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      "lang_code": "fi",
      "sense": "coproduct in some categories",
      "word": "suora summa"
    },
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      "lang": "Polish",
      "lang_code": "pl",
      "sense": "coproduct in some categories",
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      ],
      "word": "suma prosta"
    }
  ],
  "word": "direct sum"
}

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This page is a part of the kaikki.org machine-readable All languages combined dictionary. This dictionary is based on structured data extracted on 2025-12-23 from the enwiktionary dump dated 2025-12-02 using wiktextract (6fdc867 and 9905b1f). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.