different between magnitude vs eigenvalue
magnitude
English
Etymology
From Latin magnit?d? (“greatness, size”), magnus +? -t?d?.
Pronunciation
- IPA(key): /?mæ?n?tju?d/
Noun
magnitude (countable and uncountable, plural magnitudes)
- (uncountable, countable) The absolute or relative size, extent or importance of something.
- (countable) An order of magnitude.
- (mathematics) A number, assigned to something, such that it may be compared to others numerically
- (mathematics) Of a vector, the norm, most commonly, the two-norm.
- (astronomy) A logarithmic scale of brightness defined so that a difference of 5 magnitudes is a factor of 100.
- (uncountable) The apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude
- (countable) A ratio of intensity expressed as a logarithm.
- (seismology) A measure of the energy released by an earthquake (e.g. on the Richter scale).
Derived terms
- order of magnitude
- absolute magnitude
- apparent magnitude
Translations
Anagrams
- gamnitude
French
Pronunciation
- IPA(key): /ma.?i.tyd/
Noun
magnitude f (plural magnitudes)
- magnitude
Derived terms
- magnitude absolue
Galician
Noun
magnitude f (plural magnitudes)
- magnitude
Portuguese
Pronunciation
- Rhymes: -ud?i
Noun
magnitude f (plural magnitudes)
- magnitude (size, extent or importance)
- (mathematics) magnitude (value assigned to a variable)
- (mathematics) magnitude (the norm of a vector)
- (astronomy) magnitude (apparent brightness of a star)
- (seismology) magnitude (energy of an earthquake)
magnitude From the web:
- what magnitude was the san francisco earthquake
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- what magnitude was the 1906 earthquake
- what magnitude earthquake can you feel
- what magnitude was the 2011 japan earthquake
- what magnitude was the loma prieta earthquake
- what magnitude earthquake causes a tsunami
- what magnitude earthquake is bad
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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