Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact form factors in integrable quantum field theories: the scaling
  Z(N)-Ising model   A general form factor formula for the scaling Z(N)-Ising model is
constructed. Exact expressions for matrix elements are obtained for several
local operators. In addition, the commutation rules for order, disorder
parameters and para-Fermi fields are derived. Because of the unusual statistics
of the fields, the quantum field theory seems to be not related to any
classical Lagrangian or field equation.

18
The categories of this paper are: econ
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph