Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Real space method for calculation of physical properties of a
  disordered system   We introduce a new real space super cell approximation method for treating
the electronic states of disordered systems. This method is general and allows
both randomness in the on-site energies and in the hopping integrals. In the
special case of randomness in the on-site energies only, this method is
equivalent to the Non Local Coherent Potential Approximation (NLCPA) derived
previously.

2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom