lean4-htt/old_tests/tests/lean/1603.lean
2018-04-10 12:56:55 -07:00

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def some_lets :
| 0 v := v
| (nat.succ n) v := let k := some_lets n v + v in k
def some_unfolded_lets (n : ) : ∃ v : , v = some_lets 5 n :=
begin
dunfold some_lets,
-- admit
end