The cheapest way to get one is to invoke the spectral theorem and to conclude that normal operators always have non-trivial invariant subspaces.
complex spectral representation
Tomget sharper spectral lines, they started by successfully developing nonlinear methods such as saturation or two-photon spectroscopy.
On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.
The evidence may be circumstantial at first — say, spectral bar codes of interesting molecules like oxygen, ozone, methane and water — and leave room for alternative interpretations.
The visible is the most well-defined spectral region.
I am studying spectral classification.
Beings without form and intelligences without bodies are spectral ghosts guaranteed to mislead.
Baced on the random vibration theory, the non-classical modal analysis response spectral method of a non-classically damped structure under seismic ground motion is proposed, which can be adopted in seismic analyzation and computation of real structures.
They also studied the spectral lines from hot iron atoms that whirl around in a disk just beyond the neutron stars' surfaces at speeds reaching 40 percent light speed.
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