Commit 2025-03-18 10:08 621dd319
View on Github →chore(SetTheory): split Ordinal/Arithmetic.lean
(#23017)
This splits SetTheory.Ordinal.Arithmetic
into two parts by taking out all the material on indexed families of ordinals (sup
, bsub
, ...) and moving it into Ordinal.Families
. Ordinal.Arithmetic
contains the initial segment of the original file, plus some lemmas that could be upstreamed.
One change: add_le_of_limit
is no longer private, since it is used in Arithmetic.lean
and Families.lean
.