Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Force focusing in confined fibers and sheets   A thin fiber or sheet curled into a circular container has a detached region
whose shape and force ratios are independent of material properties and
container radius. We compute this shape and compare it with experiments. The
discrete forces acting at either end of the detached region have a ratio that
depends only on the length of the fiber or sheet relative to the circle radius.
We calculate this force ratio in three regimes of circle radius.

21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg