Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Multifractal Time and Irreversibility in Dynamic Systems   The irreversibility of the equations of classical dynamics (the Hamilton
equations and the Liouville equation) in the space with multifractal time is
demonstrated. The time is given on multifractal sets with fractional
dimensions. The last depends on densities of Lagrangians in a given time moment
and in a given point of space. After transition to sets of time points with the
integer dimension the obtained equations transfer in the known equations of
classical dynamics. Production of an entropy is not equally to zero in space
with multifractal time, i.e. the classical systems in this space are
non-closed.

35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph