Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new approach to the absorbing boundary conditions for the
  Schr\"odinger type equations   By the multiple-scale method some new approximate absorbing boundary
conditions for the Schr\"odinger type equations are obtained.

9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg