Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A mixed method for elasticity with the curl of displacements as a
  drilling degree of freedom   We present a mixed method for the linearized elasticity equations with
independent approximation of the curl of the displacements. The curl can be
seen as a drilling degree of freedom allowing for coupling with rotating
objects and the direct application of moments of force.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat