Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Railroad Crossing Problem: An Experiment with Instantaneous Actions
  and Immediate Reactions   We give an evolving algebra solution for the well-known railroad crossing
problem and use the occasion to experiment with agents that perform
instantaneous actions in continuous time and in particular with agents that
fire at the moment they are enabled.

21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci