Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On The Circular Altitude of Graphs   Peter Cameron introduced the concept of the circular altitude of graphs; a
parameter which was shown by Bamberg et al. that provides a lower bound on the
circular chromatic number. In this note, we investigate this parameter and show
that the circular altitude of a graph is equal to the maximum of circular
altitudes of its blocks. Also, we show that homomorphically equivalent graphs
have the same circular altitudes. Finally, we prove that the circular altitude
of the Cartesian product of two graphs is equal to the maximum of circular
altitudes of its factors.

25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph