Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deltoid tangents with evenly distributed orientations and random tilings   We study the construction of substitution tilings of the plane based on
certain simplicial configurations of tangents of the deltoid with evenly
distributed orientations. The random tiling ensembles are obtained as a result
of tile rearrangements in the substitution rules associated to edge flips.

25
The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat