Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering of low Reynolds number swimmers   We describe the consequences of time reversal invariance of the Stokes'
equations for the hydrodynamic scattering of two low Reynolds number swimmers.
For swimmers that are related to each other by a time reversal transformation
this leads to the striking result that the angle between the two swimmers is
preserved by the scattering. The result is illustrated for the particular case
of a linked-sphere model swimmer. For more general pairs of swimmers, not
related to each other by time reversal, we find hydrodynamic scattering can
alter the angle between their trajectories by several tens of degrees. For two
identical contractile swimmers this can lead to the formation of a bound state.

7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat