Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A sharp Strichartz estimate for the wave equation with data in the
  energy space   We prove a sharp bilinear estimate for the wave equation from which we obtain
the sharp constant in the Strichartz estimate which controls the
$L^4_{t,x}(\R^{5+1})$ norm of the solution in terms of the energy. We also
characterise the maximisers.

17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph