
theorem Th25:
  for G being _Graph, v being Vertex of G
  holds G.walkOf(v).edges() = {}
proof
  let G be _Graph, v be Vertex of G;
  A1: G.walkOf(v).edgeSeq() = <*>the_Edges_of G by Th24 .= {};
  thus G.walkOf(v).edges() = rng {} by A1, GLIB_001:def 17
    .= {};
end;
