In mathematics and linear algebra, a scalar value associated with a matrix or linear transformation that describes how vectors are scaled.
From 'eigenvalue,' a German-English hybrid (German 'eigen' meaning own/proper + English 'value'). The term emerged in 19th-century mathematics when studying transformations.
Eigenvalues (sometimes shortened to 'evalues' in informal use) power Google's recommendation system—they help computers understand relationships between data points in ways humans never could manually calculate.
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