What is Spectral theory of normal C*-algebras?

In mathematics, the spectral gap is the difference between the moduli of the two largest eigenvalues of a matrix or operator; alternately, it is sometimes taken as the smallest non-zero...

In mathematics, the spectral abscissa of a matrix or a bounded linear operator is the greatest real part of the matrix's spectrum. It is sometimes denoted...

In functional analysis, compact operators are linear operators on Banach spaces that map bounded sets to relatively compact sets. In the case of a Hilbert space H, the compact operators...

In mathematics and physics CCR algebras and CAR algebras arise from the quantum mechanical study of bosons and fermions respectively. They play a prominent role in quantum statistical mechanics and...

Many first principles in quantum field theory are explained, or get further insight, in string theory.

In astrophysics and planetary science, spectral slope, also called spectral gradient, is a measure of dependence of the reflectance on the wavelength. In digital signal processing, it is a measure...

In astronomy, the spectral index of a source is a measure of the dependence of radiative flux density on frequency. Given frequency...

Spectral induced polarization , or complex resistivity and also complex conductivity , is a geophysical survey technique and an extension of the induced polarization method, being itself an extension of...

In abstract algebra, a representation of a Hopf algebra is a representation of its underlying associative algebra. That is, a representation of a Hopf algebra H over a field K...