Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A nonlinear theory for shells with slowly varying thickness   We study the $\Gamma$-limit of 3d nonlinear elasticity for shells of small,
variable thickness, around an arbitrary smooth 2d surface.

3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph