Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Wafer-scale Epitaxial Graphene Growth on the Si-face of Hexagonal SiC
  (0001) for High Frequency Transistors
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
2
The categories of this paper are: math
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat