Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instantons in the Quantum Framework of 2D Gravity   We analyze the non--perturbative features of 2D quantum gravity defined by
stochastic regularization of the unstable matrix model showing, first, that the
WKB approximation of the well-defined quantum Fokker-Planck hamiltonian
corresponds to the semiclassical eigenvalue density of the former. The double
scaled potential exhibits an instanton--like behaviour, which is universal and
scales, but whose interpretation in terms of pure gravity is still open.

19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph