Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: When soft crystals defy Newton's third law: Non-reciprocal mechanics and
  dislocation motility   The effective interactions between the constituents of driven soft matter
generically defy Newton's third law. Combining theory and numerical
simulations, we establish that six classes of mechanics with no counterparts in
equilibrium systems emerge in elastic crystals challenged by nonreciprocal
interactions. Going beyond linear deformations, we reveal that interactions
violating Newton's third law generically turn otherwise quiescent dislocations
into motile singularities which steadily glide though periodic lattices.

15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con