Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinematic Equations for Front Motion and Spiral-Wave Nucleation   We present a new set of kinematic equations for front motion in bistable
media. The equations extend earlier kinematic approaches by coupling the front
curvature with the order parameter associated with a parity breaking front
bifurcation. In addition to naturally describing the core region of rotating
spiral waves the equations can be be used to study the nucleation of
spiral-wave pairs along uniformly propagating fronts. The analysis of
spiral-wave nucleation reduces to the simpler problem of droplet, or domain,
nucleation in one space dimension.

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The categories of this paper are: astro-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio