Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Order parameter fluctuations and thermodynamic phase transitions in
  finite spin systems and fragmenting nuclei   We show that in small and low density systems described by a lattice gas
model with fixed number of particles the location of a thermodynamic phase
transition can be detected by means of the distribution of the fluctuations
related to an order parameter which is chosen to be the size of the largest
fragment. We show the correlation between the size of the system and the
observed order of the transition. We discuss the implications of this
correlation on the analysis of experimental fragmentation data.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess