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### Discrete Fourier Analysis and spectral properties

## Abstract

We present some recent results on the study of Schatten-von Neumann properties for

operators on compact manifolds. We will explain the point of view of kernels and full symbols. In both cases

one relies on a suitable Discrete Fourier analysis depending on the domain.

We will also discuss about operators on $L^p$ spaces by using the notion of nuclear operator in the sense of

Grothendieck and deduce Grothendieck-Lidskii trace formulas in terms of the matrix-symbol. We present examples

for fractional powers of differential operators. (Joint work with Michael Ruzhansky)