residual spectrum

residual spectrum

[rə′zij·ə·wəl ′spek·trəm]
(mathematics)
Those members λ of the spectrum of a linear operator A on a Banach space X for which (A- λ I)-1, I being the identity operator, is unbounded with domain not dense in X.
References in periodicals archive ?
" With the voice acquisition, Reliance Jio will be the holder of the largest quantum of liberalised spectrum and with the longest residual spectrum life," Ambani, chairman and managing director of RIL, said after securing the voice spectrum.
The error estimation procedure uses average noise amplitudes from the computed residual spectrum in intervals presented in Table 1.
However, it is often possible to remove the background during a data analysis step leaving a residual spectrum of high enough signal-to-noise ratio to allow quantitative analysis.
What that is, however, is still open to debate, since the residual spectrum of the background looks unlike any other known source.