Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On admissible steady-state regimes of crack propagation in a square-cell
  lattice   In the present work the authors revisit a classical problem of crack
propagation in a lattice. Authors investigate the questions concerning possible
admissible steady-state crack propagations in an anisotropic lattice. It was
found that for certain values of contrast in elastic and strength properties of
a lattice the stationary crack propagation is impossible. Authors also address
a question of possible crack propagation at low velocity.

2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat