Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variability Models of Gamma-Ray Blazars   A large fraction of the AGNs detected by EGRET exhibit strong variability in
many wavebands- from radio to the highest energy gamma-rays observed. The
origin of the transient emission in blazars is presumably associated with
relativistic jets. In this talk plausible variability mechanisms that may
operate in blazars are discussed.

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The categories of this paper are: dg-ga
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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
1
The categories of this paper are: cs