Commit 2025-02-05 02:03 8827be0a

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feat(Data/Set/Lattice): iUnion + insertion (#21322) Another distributivity lemma with iUnion and insertions, needed for #21172. This could maybe be @[simp]

Estimated changes

Modified Mathlib/Data/Set/Lattice.lean

added theorem Set.iUnion_insert_eq_range_union_iUnion

modified theorem Set.iUnion_singleton_eq_range