public boolean detect2VertexCycle()
	{
		for(Terminal t : vertices.keySet())
		{
			for(Terminal u : vertices.keySet())
			{
				if(!t.equals(u) &&
				   adjacencyMatrix[getVertexNumber(t)][getVertexNumber(u)] == true &&
				   adjacencyMatrix[getVertexNumber(u)][getVertexNumber(t)] == true)
				{
					return true;
				}
			}
		}
		return false;
	}