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lean4-htt/tests/lean/change1.lean.expected.out
Leonardo de Moura d0afe0aa99 feat(library/tactic): add 'change' tactic
2016-06-17 13:21:52 -07:00

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a b : ℕ,
Heq : a = b
⊢ succ (succ a) = succ (b + 1)
---- after change ----
a b : ℕ,
Heq : a = b
⊢ a + 1 + 1 = b + 1 + 1
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