Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sequential isomorphisms between the sets of von Neumann algebra effects   In this paper we describe the structure of all sequential isomorphisms
between the sets of von Neumann algebra effects. It turns out that if the
underlying algebras have no commutative direct summands, then every sequential
isomorphism between the sets of their effects extends to the direct sum of a
*-isomorphism and a *-antiisomorphism between the underlying von Neumann
algebras.

25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs