different between scalar vs eigenvalue
scalar
English
Etymology
Borrowed from Latin sc?l?ris, adjectival form from sc?la (“a flight of steps, stairs, staircase, ladder, scale”), for *scadla, from scandere (“to climb”); compare scale. The mathematics sense was coined by William Rowan Hamilton in 1846.
Pronunciation
- Rhymes: -e?l?(?)
Adjective
scalar (not comparable)
- (mathematics) Having magnitude but not direction.
- (computer science) Consisting of a single value (e.g. integer or string) rather than multiple values (e.g. array).
- Of, or relating to scale.
- (music) Of or pertaining to a musical scale.
Translations
See also
- nondimensional
Noun
scalar (plural scalars)
- (mathematics) A quantity that has magnitude but not direction; compare vector.
- (electronics) An amplifier whose output is a constant multiple of its input.
Coordinate terms
- vector
Derived terms
- pseudoscalar
Translations
Anagrams
- Claars, Rascal, craals, lascar, rascal, sacral, sarlac
Dutch
Etymology
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Pronunciation
- IPA(key): /?ska?.l?r/
- Hyphenation: sca?lar
Noun
scalar m (plural scalars or scalaren)
- scalar (quantity with only magnitude)
Related terms
- scalair
Romanian
Etymology
Borrowed from French scalaire, German Scalar, Latin scalaris.
Adjective
scalar
- scalar
Noun
scalar n (plural scalare)
- scalar
scalar From the web:
- what scalar quantity
- what's scalar in physics
- scalar meaning
- what's scalar multiplication
- what scalar product
- what scalar product means
- what's scalar chain
- what scalar product do
eigenvalue
English
Etymology
eigen- +? value, a partial calque of German Eigenwert.
Pronunciation
- enPR: ??g?n'v?lyo?o, IPA(key): /?a???n?vælju?/
Noun
eigenvalue (plural eigenvalues)
- (linear algebra) A scalar, , such that there exists a non-zero vector (a corresponding eigenvector) for which the image of under a given linear operator is equal to the image of under multiplication by ; i.e. .
- 1972, F. V. Atkinson, Multiparameter Eigenvalue Problems, Volume I: Matrices and Compact Operators, Academic Press, page x,
- In the extension, one associates eigenvalues, sets of scalars, with arrays of matrices by considering the singularity of linear combinations of the matrices in the various rows, involving the same coefficients in each case. Attention to this area was called in the early l920's by R. D. Carmichael, who pointed out in addition the enormous variety of mixed eigenvalue problems with several parameters.
- 2000, Hinne Hettema (translator), J. Von Neumann, E. Wigner, On the Behaviour of Eigenvalues in Adiabatic Processes [1929], Hinne Hettema (editor), Quantum Chemistry: Classic Scientific Papers, World Scientific, page 25,
- For many quantum-mechanical problems it is important to investigate the change of eigenvalues and eigenfunctions with the continuous change of one or more parameters. The case in which one knows the eigenvalues and eigenfunctions for two special values of the parameters, and is interested in the region in between is particularly interesting.
- 2005, Leonid D. Akulenko, Sergei V. Nesterov, High-Precision Methods in Eigenvalue Problems and Their Applications, CRC Press (Chapman & Hall), page 1,
- Problems that require an investigation of eigenvalues and eigenfunctions arise in connection with numerous topics in mechanics, the theory of vibrations and stability, hydrodynamics, elasticity, acoustics, electrodynamics, quantum mechanics, etc.
- 1972, F. V. Atkinson, Multiparameter Eigenvalue Problems, Volume I: Matrices and Compact Operators, Academic Press, page x,
Usage notes
When unqualified, as in the above example, eigenvalue conventionally refers to a right eigenvalue, characterised by for some right eigenvector . Left eigenvalues, characterised by also exist with associated left eigenvectors . (In consequence of the equations, left eigenvectors are row vectors, while right eigenvectors are column vectors.) The convention of right eigenvector as "standard" is fundamentally an arbitrary choice.
Synonyms
- (scalar multiplier of an eigenvector): characteristic root, characteristic value, eigenroot, latent value, proper value
Translations
See also
- eigenbasis
- eigendecomposition, eigen decomposition
- eigenface
- eigenfunction
- eigenmode
- eigenstate
- eigensystem
- eigenvector
Further reading
- Eigenvalues and eigenvectors on Wikipedia.Wikipedia
- Transformation matrix on Wikipedia.Wikipedia
- Eigenvalue on MathWorld.
- Eigen value on Encyclopedia of Mathematics.
eigenvalue From the web:
- what eigenvalues tell you
- what eigenvalues
- what eigenvalues represent
- what eigenvalues and eigenvectors
- what eigenvalues tell us
- eigenvalues what are they
- eigenvalue what does it mean
- eigenvalue what is it used for
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