Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entropy Message Passing   The paper proposes a new message passing algorithm for cycle-free factor
graphs. The proposed "entropy message passing" (EMP) algorithm may be viewed as
sum-product message passing over the entropy semiring, which has previously
appeared in automata theory. The primary use of EMP is to compute the entropy
of a model. However, EMP can also be used to compute expressions that appear in
expectation maximization and in gradient descent algorithms.

31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg