User blog comment:P進大好きbot/Ordinal Notation Associated to Extended Buchholz's OCF/@comment-28606698-20191209102925

Seems in rule 2.4.2 we get formal string playing role of α[n]=ψ_ν^{n+1}(ψ_μ(0)) for α[n]=ψ_ν(β) with cof(β)=ψ_{μ+1}(0) instead of ψ_ν(ψ_μ^{n+1}(0)) in original system for FS for ordinals of EBF