Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational Wave Detection and Fundamental Physics in Space: Foreword   This article is a foreword for the special issue on Gravitational Wave
Detection and Fundamental Physics in Space for International Journal of Physics
D. In the foreword, we review briefly the history of the development of mission
concepts and projects for the gravitational wave detection in space together
with fundamental physics missions. We summarize briefly the gravitational-wave
detection-in-space science goals and the current progress in the experimental &
technological developments presented in the articles of this special issue, and
list the articles with publication information and arXiv numbers.

3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat