Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The worm-like chain model at small and large stretch   The relation between force and stretch in the worm-like chain model of
entropic elasticity is examined. Although no closed-form expression is valid
for all values of forcing, solutions in the form of asymptotic series can be
obtained under conditions of small and large applied force. The small and large
stretch limits correspond to regular and boundary layer perturbation problems,
respectively. The perturbation problems are solved and series solutions
obtained for force as a function of stretch. The form of the asymptotic series
suggest a uniform approximation valid for all stretch that is an improvement on
existing approximations.

17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics