Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Parametrization of the Neutrino Mixing Matrix   The neutrino mixing matrix is expanded in powers of a small parameter
$\lambda$, which approximately equals to 0.1. The meaning of every order of the
expansion is discussed respectively, and the range of $\lambda$ is carefully
calculated. We also present some applications of this new parametrization, such
as to the expression of the Jarlskog parameter $J$, in which the simplicities
and advantages of this parametrization are shown.

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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph