Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Arcs in finite projective spaces   This is an expository article detailing results concerning large arcs in
finite projective spaces, which attempts to cover the most relevant results on
arcs, simplifying and unifying proofs of known old and more recent theorems.
The article is mostly self-contained and includes a proof of the most general
form of Segre's lemma of tangents and a short proof of the MDS conjecture over
prime fields based on this lemma.

7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
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The categories of this paper are: eess
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex