Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simple proof of Floquet's theorem for the case of unitary evolution in
  quantum mechanics   We present a constructive proof of Floquet's theorem for the special case of
unitary time evolution in quantum mechanics. The proof is straightforward and
suitable for study in courses on quantum mechanics.

17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex