Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algorithmic Solutions to Some Transportation Optimization Problems with
  Applications in the Metallurgical Industry   In this paper we address several constrained transportation optimization
problems (e.g. vehicle routing, shortest Hamiltonian path), for which we
present novel algorithmic solutions and extensions, considering several
optimization objectives, like minimizing costs and resource usage. All the
considered problems are motivated by practical situations arising, for
instance, in the mining and metallurgical industry or in data communication. We
restrict our attention to transportation networks with path, tree or geometric
structures, for which the developed polynomial-time algorithms are optimal or
nearly optimal.

27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat