What is Hilbert spectrum?

The David Hilbert Award, named after David Hilbert, was established by the World Federation of National Mathematics Competitions to acknowledge mathematicians who have contributed to the development of mathematics worldwide....

The Hilbert–Huang transform is a way to decompose a signal into so-called intrinsic mode functions along with a trend, and obtain instantaneous frequency data. It is designed to work well...

The radio spectrum scope was invented by Marcel Wallace - and measures and shows the magnitude of an input signal versus frequency within one or more radio bands - e.g....

In mathematics, and in particular functional analysis, the tensor product of Hilbert spaces is a way to extend the tensor product construction so that the result of taking a tensor...

In mathematics, a Hilbert manifold is a manifold modeled on Hilbert spaces. Thus it is a separable Hausdorff space in which each point has a neighbourhood homeomorphic to an infinite...

In time series analysis, the cross-spectrum is used as part of a frequency domain analysis of the cross-correlation or cross-covariance between two time series.

In mathematics, weak convergence in a Hilbert space is convergence of a sequence of points in the weak topology.

In mathematics, the Hilbert–Pólya conjecture states that the non-trivial zeros of the Riemann zeta function correspond to eigenvalues of a self-adjoint operator. It is a possible approach to the Riemann...