Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge in electric field in probability representation   Green function and linear integrals of motion for a charged particle moving
in electric field are discussed. Wigner function and tomogram of the ststionary
states of the charge are obtained. Connection of quantum propagators for
Schrodinger evolution equation, Moyal evolution equation and evolution equation
in tomographic probability representation for charge moving in electric field
is discussed.

7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph