Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extending DUNE: The dune-xt modules   We present our effort to extend and complement the core modules of the
Distributed and Unified Numerics Environment DUNE (http://dune-project.org) by
a well tested and structured collection of utilities and concepts. We describe
key elements of our four modules dune-xt-common, dune-xt-grid, dune-xt-la and
dune-xt-functions, which aim at further enabling the programming of generic
algorithms within DUNE as well as adding an extra layer of usability and
convenience.

17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol