noun Mathematics.

1925–30; partial translation of German Eigenwert, equivalent to eigen- characteristic, particular + Wert value

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World English Dictionary
eigenvalue (ˈaɪɡənˌvæljuː)
maths, physics one of the particular values of a certain parameter for which a differential equation or matrix equation has an eigenfunction. In wave mechanics an eigenvalue is equivalent to the energy of a quantum state of a system

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Computing Dictionary

eigenvalue definition

The factor by which a linear transformation multiplies one of its eigenvectors.

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
For temporally evolving flows, the eigenvalue is the complex frequency and the problem becomes linear in the eigenvalue.
My research interests include the numerical solution of large-scale eigenvalue problems and differential equations.
These transformations are needed for the calculation of the eigenvectors during the eigenvalue refinement.
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