Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strong instability of standing waves for nonlinear Schr\"odinger
  equations with double power nonlinearity   We prove strong instability (instability by blowup) of standing waves for
some nonlinear Schr\"odinger equations with double power nonlinearity.

5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin