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Qu'est-ce (qui) est K-theory spectrum - définition

K-theory spectrum

In mathematics, given a ring R, the K-theory spectrum of R is an Ω-spectrum K_R whose nth term is given by, writing \Sigma R for the suspension of R,

https://en.wikipedia.org/wiki/K-theory_spectrum

Spectrum (functional analysis)

TERM USED IN FUNCTIONAL ANALYSIS

Approximate eigenvalue; Operator spectrum; Spectrum of an operator; Compression spectrum; Spectral representation; Point spectrum; Continuous spectrum (functional analysis)

In mathematics, particularly in functional analysis, the spectrum of a bounded linear operator (or, more generally, an unbounded linear operator) is a generalisation of the set of eigenvalues of a matrix. Specifically, a complex number λ is said to be in the spectrum of a bounded linear operator T if T-\lambda I is not invertible, where I is the identity operator.

https://en.wikipedia.org/wiki/Spectrum_(functional_analysis)

spectrum

CONTINUOUS RANGE OF VALUES, SUCH AS WAVELENGTHS IN PHYSICS

Energy spectrum; Spectracular; Energy spectra; Spectroscopic observations; Spectral density (physical science); Spectrum of disease; Spectrum (physics)

(spectra, or spectrums)

1.

The spectrum is the range of different colours which is produced when light passes through a glass prism or through a drop of water. A rainbow shows the colours in the spectrum.

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2.

A spectrum is a range of a particular type of thing.

Politicians across the political spectrum have denounced the act...

The term 'special needs' covers a wide spectrum of problems.

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3.

A spectrum is a range of light waves or radio waves within particular frequencies.

Vast amounts of energy, from X-rays right through the spectrum down to radio waves, are escaping into space...

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