Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Velocity space degrees of freedom of plasma fluctuations   We present the first measurements of a plasma velocity-space
cross-correlation matrix. A singular value decomposition is applied to this
inherently Hermitian matrix, and the relation between the eigenmodes and the
plasma kinetic fluctuation modes is explored. A generalized wave admittance is
introduced for these eigenmodes.

1
The categories of this paper are: cs
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas