Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on the supersingular K3 surface of Artin invariant 1   We prove that the supersingular K3 surface of Artin invariant 1 in
characteristic p (where p denotes an arbitrary prime) admits a model over IF_p
with Picard number 21.

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
18
The categories of this paper are: econ
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg