Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Steiner tree problem revisited through rectifiable G-currents   The Steiner tree problem can be stated in terms of finding a connected set of
minimal length containing a given set of finitely many points. We show how to
formulate it as a mass-minimization problem for $1$-dimensional currents with
coefficients in a suitable normed group. The representation used for these
currents allows to state a calibration principle for this problem. We also
exhibit calibrations in some examples.

29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom