Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bicontinuous surfaces in self-assembling amphiphilic systems   Amphiphiles are molecules which have both hydrophilic and hydrophobic parts.
In water- and/or oil-like solvent, they self-assemble into extended sheet-like
structures due to the hydrophobic effect. The free energy of an amphiphilic
system can be written as a functional of its interfacial geometry, and phase
diagrams can be calculated by comparing the free energies following from
different geometries. Here we focus on bicontinuous structures, where one
highly convoluted interface spans the whole sample and thereby divides it into
two separate labyrinths. The main models for surfaces of this class are triply
periodic minimal surfaces, their constant mean curvature and parallel surface
companions, and random surfaces. We discuss the geometrical properties of each
of these types of surfaces and how they translate into the experimentally
observed phase behavior of amphiphilic systems.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph