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14
15 include "basics/relations.ma".
16
17 (* GENERATED LIBRARY ********************************************************)
18
19 lemma insert_eq_1 (T1) (a1) (Q1,Q2:predicate T1):
20       (∀b1. Q1 b1 → a1 = b1 → Q2 b1) → Q1 a1 → Q2 a1.
21 /2 width=1 by/ qed-.