Here is my additional list of abandoned works.
See also: Legacy site (February - May 2022, scrapped)
Abandoned. Migrated to the independent website here.
Here is my old inventions of my -illions, based on many purposes. All of them are abandoned.
The Grand Science (extended Tier 4 to Tier 6)
Abandoned. Moved to the next website here.
I defined the left-associative exponentiation-based Hyper-B notation, which generally grows significantly slower than the up-arrow notation (for basic arrays). Abandoned later just a day after ported from the old googology website.
Hex function is the function created by me. It is based on hexadecimal (base 16) numeral system. Abandoned 5 June 2022.
My notation extension based on Saibian's Extended Cascading-E notation that goes up to the Bachmann-Howard ordinal.
Version 2 (merged to Phenol notation)
I decided to fix some ill-definedness of the UNAN since P進大好きbot pointed out the ill-definedness for the first time.
I would make the notation much more well-defined by completely remaking this notation with many tweaks, but there isn't enough time here.
Here is the ordinal collapsing function based on extended Buchholz's function (based on brief introduction).
I decided to analyze and attempt to fix multiple expansions of the Y sequences. Unfortunately, on September 3, 2025, it doesn't work correctly, so I abandoned it.