Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the algorithmic behaviour of complex physical systems   Starting from the idea that the underlying mechanisms driving the observable
processes in nature are algorithmic, we exemplify this in two ways: nature
works as a computing machine and thus the processes running on it optimize
themselves in an intrinsic manner so as to save time. As a first example we
will place the empirical analysis of oxidation in the context of algorithm
complexity analysis. Second, we will show that deformations suffered by a
shape-memory alloy may be produced by nature showing a LIFO (Last In First Out)
behaviour.

18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci