Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Variation of the Fine-Structure Constant from the de Sitter Invariant
  Special Relativity   There are obvious discrepancies among various experimental constraints on the
variation of the fine-structure constant, $\alpha$. We attempt to discuss the
issue in the framework of de Sitter invariant Special Relativity (${\cal
SR}_{c,R}$) and to present a possible solution to the disagreement. In
addition, on the basis of the observational data and the discussions presented
in this Letter, we derive a rough theoretical estimate of the radius of the
Universe.

0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat