Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New examples of three-dimensional dilational materials   Two-dimensional dilational materials, for which the only easy mode of
deformation is a dilation are reviewed and connections are drawn between models
previously proposed in the literature. Some models which appear to be
dilational materials, but which in fact are not, are also discussed. Finally,
four new examples of three-dimensional dilational materials are given.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg