Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inconsistency of quantum--classical dynamics, and what it implies   A new proof of the impossibility of a universal quantum-classical dynamics is
given. It has at least two consequences. The standard paradigm ``quantum system
is measured by a classical apparatus" is untenable, while a quantum matter can
be consistently coupled only with a quantum gravity.

11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas