Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Paradoxical aspects of the kinetic equations   Two paradoxical aspects of the prevailing kinetic equations are presented.
One is related to the usual understanding of distribution function and the
other to the usual understanding of the phase space. With help of simple
counterexamples and direct analyses, involved paradoxes manifest themselves.

10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con