Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instability of stretched and twisted soap films in a cylinder   A soap film, or a flexible membrane without bending and torsional stiffness,
that is confined in a cylinder is shown to be susceptible to a
surface-tension-driven instability when it is stretched or twisted. This leads
to its breakdown and places an upper limit on the aspect ratio of such
structures. A simple analysis confirms the values for the critical aspect ratio
of the stretched film found in both simulations and experiments on soap films,
and this threshold decreases with increasing twist of the film.

23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph