Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Euler-Rodrigues formula for three-dimensional rotation via fractional
  powers of matrices   In this short paper, we review the Euler-Rodrigues formula for
three-dimensional rotation via fractional powers of matrices. We derive the
rotations by any angle through the spectral behavior of the fractional powers
of the rotation matrix by $\frac{\pi}{2}$ in $\mathbb{R}^3$ about some axis.

22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an