Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proceedings Thirteenth Workshop on Quantitative Aspects of Programming
  Languages and Systems   This volume contains the proceedings of the Thirteenth Workshop on
Quantitative Aspects of Programming Languages and Systems (QAPL 2015), held in
London, UK, on 11 and 12 April, 2015. QAPL 2015 was a satellite event of the
European Joint Conferences on Theory and Practice of Software (ETAPS) focussing
on quantitative aspects of computation. The Program Committee of QAPL 2015
selected 8 regular papers and 2 presentation-only papers. The workshop
programme included two QAPL keynote presentations by Catuscia Palamidessi
(Inria/LIX, France) on "Quantitative Aspects of Privacy and Information Flow,"
and Holger Hermanns (Saarland University, Germany) on "Optimal Continuous Time
Markov Decisions."

13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph