Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Mechanics on Periodic and Non-Periodic Lattices and Almost
  Unitary Schwinger Operators   In this work we uncover the mathematical structure of the Schwinger algebra
and introduce an almost unitary Schwinger operators which are derived by
considering translation operators on a finite lattice. We calculate
mathematical relations between these algebras and show that the almost unitary
Schwinger operators are equivalent to the Schwinger algebra. We introduce new
representations for MN(C) in terms of these algebras.

11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph