Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bifurcating trajectory of non-diffractive electromagnetic Airy pulse   The explicit expression for spatial-temporal Airy pulse is derived from the
Maxwell's equations in paraxial approximation. The trajectory of the pulse in
the time-space coordinates is analysed. The existence of a bifurcation point
that separates regions with qualitatively different features of the pulse
propagation is demonstrated. At this point the velocity of the pulse becomes
infinite and the orientation of it changes to the opposite.

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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
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The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess