Commit 2020-06-14 16:36 0d052998
View on Github →chore(data/finset): rename ext
/ext'
/ext_iff
(#3069)
Now
ext
is the@[ext]
lemma;ext_iff
is the lemmas₁ = s₂ ↔ ∀ a, a ∈ s₁ ↔ a ∈ s₂
. Also add 2norm_cast
attributes and a lemmassubset_iff_of_subset
.