Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Concentration Fluctuations from Multinomial Probability Theory and the
  possible role in continuum Microkinetic Rate Theory   Recently, continuum Microkinetic Rate Theory (cMRT) has been advanced as a
method of studying rates of systems, where deviations between observation and
cMRT theory have been found, and it hypothesized that these deviations are
linked either to oscillations or fluctuations. Multinomial probability theory
(MPT) is used to derive analytical expressions for concentration fluctuations,
giving the fluctuations as a function of average concentrations and sample
sizes. MPT predictions of fluctuations in kinetically constrained systems are
verified against kinetic Monte Carlo, and it analytically shown that MPT
predicts canonical and grand canonical ensemble fluctuations. These fluctuation
results are discussed in conjunction with cMRT deviations and it argued that
fluctuations are not responsible for the deviations.

10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat