Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $|V_{ud}|$, $|V_{us}|$, $|V_{cd}|$, $|V_{cs}|$ and charm (semi)leptonic
  decays: WG1 summary from CKM 2016   We summarize the current status of the determination of the CKM matrix
elements |V_ud| and |V_us|, which is at the precision frontier of CKM
phenomenology. We also review recent progress on the study of charm
(semi)leptonic decays, and the determination of |V_cd| and |V_cs|.

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The categories of this paper are: math
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
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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: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th