Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-N limit of non-local 2D generalized Yang-Mills theories on
  non-orientable surface   The large-group behavior of the non-local two dimensional generalized
Yang-Mills theories (nlgYM$_2$'s) on arbitrary closed non-orientable surfaces
is investigated. It is shown that all order of $\phi^{2k}$ model of these
theories have thired order phase transition only on projective plane (RP$^2$).
Also the phase structure of $\phi^2 + \frac{\gamma}{4}\phi^4$ model of
nlgYM$_2$ is studied and it is found that for $\gamma >0$, this model has third
order phase transition only on RP$^2$ and for $\gamma<0$ it has third order
phase transition on any closed non-orientable surfaces except RP$^2$ and Klein
bottel.

23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
2
The categories of this paper are: math
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
3
The categories of this paper are: physics