Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect algebras with state operator   State operators on convex effect algebras, in particular effect algebras of
unital JC-algebras, JW-algebras and convex sigma-MV algebras are studied and
their relations with conditional expectations in algebraic sense as well as in
the sense of probability on MV-algebras are shown.

19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom