Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Dashed lines represent edges required by condition y ∈ N(x1, x3). Dotted lines represent possible extra edges that make the resulting induced graph isomorphic to G26, G68 or G70 instead of G24, with x in orbits o65, o68 or o70 instead of o59; these orbits appear on the left-hand side of Eq (1).
