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extra application of discrete_topology
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zstone1 committed Oct 3, 2024
1 parent 9bc5555 commit 1724e44
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2 changes: 1 addition & 1 deletion theories/cantor.v
Original file line number Diff line number Diff line change
Expand Up @@ -484,7 +484,7 @@ Local Lemma cantor_surj_pt1 : exists2 f : Tree -> T,
Proof.
pose entn n := projT2 (cid (ent_balls' (count_unif n))).
have [ | |? []//| |? []// | |] := @tree_map_props
(discrete_topology \o K) T (embed_refine) (embed_invar) cptT hsdfT.
K T (embed_refine) (embed_invar) cptT hsdfT.
- move=> n U; rewrite eqEsubset; split=> [t Ut|t [? ? []]//].
have [//|_ _ _ + _] := entn n; rewrite -subTset.
move=> /(_ t I)[W cbW Wt]; exists (existT _ W cbW) => //.
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