Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic Rocket Control (Relativistic Space-Travel Flight Control):
  Feedback Control of Relativistic Dynamics Propelled by Ejecting Mass   In this short note, we investigate the feedback control of relativistic
dynamics propelled by mass ejection, modeling, e.g., the relativistic rocket
control or the relativistic (space-travel) flight control. As an extreme case,
we also examine the control of relativistic photon rockets which are propelled
by ejecting photons.

8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph