Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Threading the Needle: Generating Textures in Nematics   The Hopf fibration is an example of a texture: a topologically stable,
smooth, global configuration of a field. Here we demonstrate the controlled
sculpting of the Hopf fibration in nematic liquid crystals through the control
of point defects. We demonstrate how these are related to torons by use of a
topological visualization technique derived from the Pontryagin-Thom
construction.

9
The categories of this paper are: nlin
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The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg