Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Cameron-Liebler line classes with parameter $\frac{q^2+1}{2}$   New families of Cameron-Liebler line classes of ${\rm PG}(3,q)$, $q\ge 7$
odd, with parameter $(q^2+1)/2$ are constructed.

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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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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: hep-th
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The categories of this paper are: dg-ga