Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Do We Understand Quantum Mechanics - Finally?   After some historical remarks concerning Schroedinger's discovery of wave
mechanics, we present a unified formalism for the mathematical description of
classical and quantum-mechanical systems, utilizing elements of the theory of
operator algebras. We then review some basic aspects of quantum mechanics and,
in particular, of its interpretation. We attempt to clarify what Quantum
Mechanics tells us about Nature when appropriate experiments are made. We
discuss the importance of the mechanisms of "dephasing" and "decoherence" in
associating "facts" with possible events and rendering complementary possible
events mutually exclusive.

19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con