Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A study of the phase transition in 4D pure compact U(1) LGT on toroidal
  and spherical lattices   We have performed a systematic study of the phase transition in the pure
compact U(1) lattice gauge theory in the extended coupling parameter space
(\beta, \gamma) on toroidal and spherical lattices. The observation of a
non-zero latent heat in both topologies for all investigated \gamma in the
interval [+0.2,-0.4], together with an effective exponent \nu = 1/d when large
enough lattices are considered, lead us to conclude that the phase transition
is first order. For negative \gamma, our results point to an increasingly weak
first order transition as \gamma is made more negative.

29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg