Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solution to the measurement problem within linear, unitary, no collapse,
  no particle quantum mechanics   The measurement problem is to explain why a system which is in a linear
combination of states appears, upon measurement, to be in just one of those
states. The solution given here is to first show that if one assumes linear,
unitary, no collapse, no particle quantum mechanics, the different versions of
reality are completely isolated from each other. This then implies only the
eigenstates appropriate to the measurement setup will be perceived. In a
Stern-Gerlach experiment, for example, only spin up or spin down will be
perceived, but never a combination of the two.

4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph