User blog comment:Alemagno12/TaN FGH/@comment-27014275-20151026070403/@comment-26428969-20151026181716

very informally speaking, if what I think is correct, then the final limit of the notation (i.e. F(0) = <0,1>, F(n+1) = <01>) is gamma_0, i.e. <01> has level phi(A's level,0)