Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bilinear Estimates and Applications to Nonlinear Wave Equations   We undertake a systematic review of some results concerning local
well-posedness of the Cauchy problem for certain systems of nonlinear wave
equations, with minimal regularity assumptions on the initial data. Moreover we
provide a considerably simplified and unified treatment of these results and
provide also complete proofs for large data. The paper is also intended as an
introduction to and survey of current research in the very active area of
nonlinear wave equations. The key ingredients throughout the survey are the use
of the null structure of the equations we consider and, intimately tied to it,
bilinear estimates.

24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs