identity matrix


Definition of identity matrix

: a square matrix that has numeral 1's along the principal diagonal and 0's elsewhere

Examples of identity matrix in a Sentence

Recent Examples on the Web For example, the identity element in the group must be assigned the identity matrix. Quanta Magazine, "The ‘Useless’ Perspective That Transformed Mathematics," 9 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'identity matrix.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of identity matrix

1908, in the meaning defined above

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The first known use of identity matrix was in 1908

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Cite this Entry

“Identity matrix.” Dictionary, Merriam-Webster, Accessed 26 Oct. 2020.

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