Spectrum and resolvent

[396/55%]

Subtopics

Essential spectrum[72/49%]
Spectral radius formula (Gelfand)[62/60%]
Spectral mapping theorem[45/49%]
Spectra of multiplication and diagonal operators[40/65%]
Computing spectra of concrete operators[38/87%]
Spectra of self-adjoint, normal and unitary operators[33/48%]
Spectrum of an element of a Banach algebra[22/18%]
Spectrum of a compact operator (Riesz-Schauder theory)[21/52%]
Spectra of concrete compact operators[19/84%]
Resolvent identities, analyticity and resolvent bounds[16/56%]
Weyl sequences and approximate point spectrum[13/38%]
The spectrum is a nonempty compact set[12/42%]
Eigenfunctions and spectrum of the Fourier transform operator[11/73%]
Operators with prescribed spectrum[10/50%]
Perturbation and semicontinuity of the spectrum[10/70%]
Point, continuous, residual and compression spectrum[10/50%]
Neumann series, successive approximations and resolvent kernel[8/100%]
Spectrum of the Hilbert-space adjoint[7/43%]
Spectra of Banach-space adjoints[6/17%]
Isolated spectral points, poles of the resolvent and Riesz projections[5/0%]
Spectra of direct sums, restrictions and extensions[3/100%]
Spectrum lies in the closure of the numerical range[3/67%]
Weyl's theorem on compact perturbations[3/100%]