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LU

proper nounnounnouncommon in dialogue

A matrix decomposition which writes a matrix as the product of a lower and upper triangular matrix, used in numerical analysis to solve systems of linear equations or find the inverse of a matrix.

proper noun

  1. 1

    Variant of London UndergroundInitialism of London Underground.

  2. 2

    Variant of Liberty Union PartyInitialism of Liberty Union Party.

  3. 3

    Variant of La UnionInitialism of La Union.

noun

  1. 1

    Variant of livestock unitInitialism of livestock unit.

noun

  1. 1

    A matrix decomposition which writes a matrix as the product of a lower and upper triangular matrix, used in numerical analysis to solve systems of linear equations or find the inverse of a matrix.

Etymology

Short for lower-upper.

Forms

plural
LUs
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).