Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hamiltonian Formulation of Classical Fields with Fractional Derivatives   An investigation of classical fields with fractional derivatives is presented
using the fractional Hamiltonian formulation. The fractional Hamilton's
equations are obtained for two classical field examples. The formulation
presented and the resulting equations are very similar to those appearing in
classical field theory.

16
The categories of this paper are: stat
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom