User blog comment:Hyp cos/Advanced approximation project/@comment-28606698-20170914124033/@comment-28606698-20170915162610

Somebody who does table of approximations can choose any ordinal notation he/she prefers and -Yes - for chosen ordinal notation the certain  FS-system which aviable via link of second abbreviation is used.

For example if we read FGH+WH in this case WH leads us to a specific FS system formulated by Stan Wainer for assignation of FS for ordinals less than $$epsilon_0$$.