Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of estimates for dispersive equations   This paper describes a new comparison principle that can be used for the
comparison of space-time estimates for dispersive equations. In particular,
results are applied to the global smoothing estimates for several classes of
dispersive partial differential equations.

16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex