Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Growth of Nanosize and Colloid Particles by Controlled Addition of
  Singlets   We outline a theoretical framework for estimating the evolution of the
particle size distribution in colloid and nanoparticle synthesis, when the
primary growth mode is by externally controlled addition of singlet building
blocks. The master equations, analyzed in the leading "non-diffusive" expansion
approximation, are reduced to a set of easily numerically programmable
relations that yield information on the time evolution of the particle size
distribution.

2
The categories of this paper are: math
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas