User blog comment:P進大好きbot/New Issue on Traditional Analyses/@comment-30279966-20200114103236

> For any countable ordinals \(\alpha\) and \(\beta\), \(\alpha<\beta\) implies \(f_\alpha \ll f_\beta\) with respect to any system of fundamental sequence.

Is it at least true for recursive \(\alpha\) and \(\beta\)?