Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cohomology of rotational tiling spaces   A spectral sequence is defined which converges to the \v{C}ech cohomology of
the Euclidean hull of a tiling of the plane with Euclidean finite local
complexity. The terms of the second page are determined by the so-called ePE
homology and ePE cohomology groups of the tiling, and the only potentially
non-trivial boundary map has a simple combinatorial description in terms of its
local patches. Using this spectral sequence, we compute the \v{C}ech cohomology
of the Euclidean hull of the Penrose tilings.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin