Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On structure-preserving transformations of the Ito generator matrix for
  model reduction of quantum feedback networks   Two standard operations of model reduction for quantum feedback networks,
elimination of internal connections under the instantaneous feedback limit and
adiabatic elimination of fast degrees of freedom, are cast as
structure-preserving transformations of It\=o generator matrices. It is shown
that the order in which they are applied is inconsequential.

22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin