User blog comment:PsiCubed2/How to make Deedlit's Mahlo-level notation more intuitive/@comment-30869823-20180808201546/@comment-30869823-20180818114412

@Emlightened I don't think so, the supremum of inaccesible cardinals insn't always regular take \( \sup\{ I_n : n \in \omega \} \) for example which has cofanity \( \omega \) and thous isn't regular.