Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stringy Instantons   A canonical Lorentz invariant field theory extension of collective field
theory of d=1 matrix models is presented.
  We show that the low density, discrete, sector of collective field theory
includes single eigenvalue Euclidean instantons which tunnel between different
vacua of the extended theory. These "stringy" instantons induce
non-perturbative effective operators of strength $e^{-{1/g}}$. The relationship
of the world sheet description of string theory and Liouville theory to the
effective space-time theory is explained.

16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom