Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A detailed proof of the von Neumann's Quantum Ergodic Theorem   We present a simplified proof of the von Neumann's Quantum Ergodic Theorem.
This important result was initially published in german by J. von Neumann in
1929.
  We are interested here in the time evolution $\psi_t$, $t\geq 0$, (for large
times) under the Schrodinger equation associated to a given fixed Hamiltonian
$H : \mathcal{H} \to \mathcal{H}$ and a general initial condition $\psi_0$. The
dimension of the Hilbert space $\mathcal{H}$ is finite.

21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex