Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nematic textures in spherical shells   The equilibrium texture of nematic shells is studied as a function of their
thickness. For ultrathin shells the ground state has four short 1/2
disclination lines but, as the thickness of the film increases, a three
dimensional escaped configuration composed of two pairs of half-hedgehogs
becomes energetically favorable. We derive an exact solution for the nematic
ground state in the one Frank constant approximation and study the stability of
the corresponding texture against thermal fluctuations.

23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph