Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structural Invariance: A Link Between Chaos and Random Matrices   The concept of structural invariance previously introduced by the authors is
used to argue that the connection between random matrix theory and quantum
systems with a chaotic classical counterpart is in fact largely exact in the
semiclassical limit, holding for all correlation functions and all energy
ranges. This goes considerably further than the usual results obtained through
periodic orbit theory.These results hold for eigenvalues of bounded
time-independent systems as well as for eigenphases of periodically kicked
systems and scattering systems.

37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom