Phrase guide

identity matrix

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A diagonal matrix all of whose diagonal elements are equal to 1.

Definition source: English Wiktionary via Wiktextract

Topics: linear-algebra, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a scalar matrix in which all of the diagonal elements are unity

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unit matrix

Antonyms: none provided

Broader terms: scalar matrix

History

Etymology

No etymology was provided for this word.

Across languages

Translations

32 source translations are retained for this English entry.

  • Catalan: matriu identitat — diagonal matrix with all diagonal elements equal to 1
  • Chinese Mandarin: 單位矩陣 /单位矩阵 (dānwèi jǔzhèn) — diagonal matrix with all diagonal elements equal to 1
  • Chinese Mandarin: 單位方陣 /单位方阵 (dānwèi fāngzhèn) — diagonal matrix with all diagonal elements equal to 1
  • Czech: jednotková matice — diagonal matrix with all diagonal elements equal to 1
  • Danish: identitetsmatrix — diagonal matrix with all diagonal elements equal to 1
  • Danish: enhedsmatrix — diagonal matrix with all diagonal elements equal to 1
  • Dutch: eenheidsmatrix — diagonal matrix with all diagonal elements equal to 1
  • Estonian: ühikmaatriks — diagonal matrix with all diagonal elements equal to 1
  • Finnish: yksikkömatriisi — diagonal matrix with all diagonal elements equal to 1
  • Finnish: identiteettimatriisi — diagonal matrix with all diagonal elements equal to 1
  • French: matrice identité — diagonal matrix with all diagonal elements equal to 1
  • French: matrice unité — diagonal matrix with all diagonal elements equal to 1
  • Galician: matriz identidade — diagonal matrix with all diagonal elements equal to 1
  • German: Einheitsmatrix — diagonal matrix with all diagonal elements equal to 1
  • German: Identitätsmatrix — diagonal matrix with all diagonal elements equal to 1
  • Hungarian: egységmátrix — diagonal matrix with all diagonal elements equal to 1
  • Hungarian: identitásmátrix — diagonal matrix with all diagonal elements equal to 1
  • Icelandic: einingarfylki — diagonal matrix with all diagonal elements equal to 1
  • Italian: matrice identità — diagonal matrix with all diagonal elements equal to 1
  • Japanese: 単位行列 (tan'i gyōretsu) — diagonal matrix with all diagonal elements equal to 1
  • Norwegian: identitetsmatrise — diagonal matrix with all diagonal elements equal to 1
  • Polish: macierz jednostkowa — diagonal matrix with all diagonal elements equal to 1
  • Portuguese: matriz identidade — diagonal matrix with all diagonal elements equal to 1
  • Romanian: matrice unitate — diagonal matrix with all diagonal elements equal to 1
  • Romanian: matrice identitate — diagonal matrix with all diagonal elements equal to 1
  • Russian: едини́чная ма́трица (jediníčnaja mátrica) — diagonal matrix with all diagonal elements equal to 1
  • Serbo-Croatian: јединична матрица (jedinična matrica) — diagonal matrix with all diagonal elements equal to 1
  • Serbo-Croatian: jedinična matrica — diagonal matrix with all diagonal elements equal to 1
  • Spanish: matriz identidad — diagonal matrix with all diagonal elements equal to 1
  • Swedish: enhetsmatris — diagonal matrix with all diagonal elements equal to 1
  • Tagalog: isahing baskagan — diagonal matrix with all diagonal elements equal to 1
  • Thai: เมทริกซ์เอกลักษณ์ — diagonal matrix with all diagonal elements equal to 1