Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tiling of regular polygon with similar right triangles   A tiling is a decomposition of a polygon into finitely many non-overlapping
triangles. We prove that if a regular n-gon, $n \geq 5$, $n \neq 28$, can be
tiled with similar right triangles, then one of the angles of these triangles
is in $\left\{\frac{\pi}{n},\frac{2\pi}{n}, \frac{\pi}
{6}+\frac{2\pi}{3n}\right\}$. Some related results were previously obtained by
M.Laczkovich and B. Szegedy.

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph