Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of polymer-polymer interactions on the surface tension of
  colloid-polymer mixtures   The density profile and surface tension for the interface of phase-separated
colloid-polymer mixtures have been studied in the framework of the square
gradient approximation for both ideal and interacting polymers in good solvent.
The calculations show that in the presence of polymer-polymer excluded volume
interactions the interfaces have lower widths and surface tensions compared to
the case of ideal polymers. These results are a direct consequence of the
shorter range and smaller depth of the depletion potential between colloidal
particles induced by interacting polymers.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th