Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Selmer group attached to a modular form and an algebraic Hecke
  character   We construct an Euler system of generalized Heegner cycles to bound the
Selmer group associated to a modular form and an algebraic Hecke character. The
main argument is based on Kolyvagin's machinery explained by Gross while the
key object of the Euler system, the generalized Heegner cycles, were first
considered by Bertolini, Darmon and Prasanna.

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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: eess