Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Real event detection and the treatment of congestive heart failure: an e
  fficient technique to help cardiologists to make crucial decisions   Using a method of entropic analysis of time series we establish the
correlation between heartbeat long-range memory and mortality risk in patients
with congestive heart failure.

32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con