Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Identities for the Action   In this paper we derive various identities involving the {\it action}
functional which enters the path-integral formulation of quantum mechanics.
They provide some kind of generalisations of the Ehrenfest theorem giving
correlations between powers of the action and its functional derivatives.

2
The categories of this paper are: math
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph