User blog comment:Nayuta Ito/PEGG detailed log/L/@comment-32697988-20180430212406/@comment-30754445-20180703215250

No. The small letters are a relatively new development, that allows to write functions between "H" and "J" with letters alone.

HGx = 4|3|x =10↑↑↑↑10↑↑↑x

While

Hg(x)= (4+3)|x = 7|x = 10↑↑↑↑↑↑↑x

which is much larger.

(and I'm happy that my notation gets some recognition and interest from the "amateur" googologists. For some reason, none of the veteran experts like it very much, and for the life of me I cannot understand why)