Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Langlands Program and Ramanujan Conjecture: a survey   We present topics in the Langlands Program to graduate students and a wider
mathematically mature audience. We study both global and local aspects in
characteristic zero as well as characteristic $p$. We look at modern approaches
to the generalized Ramanujan conjecture, which is an open problem over number
fields, and present known cases over function fields. In particular, we study
automorphic $L$-functions via the Langlands-Shahidi method. Hopefully, our
approach to the Langlands Program can help guide the interested reader into an
exciting field of mathematical research.

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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: dg-ga