Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase Transition for the Contact Process in a Random Environment on
  Zd*Z+   We review the results in Chen & Yao(2009,2012) which concern the contact
process in a static random environment on the half space Z^d*Z^+ and make some
addition to them. Furthermore, we explain why our methods cannot apply to the
whole space case and compare our results with some related works.

28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th