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github.com
/
leanprover
/
lean4
/
refs/heads/upstream/Array.mapIdx
/
.
/
tests
/
lean
/
4375.lean
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example
:
Nat
→
Nat
:=
let
a
:
Nat
:=
Nat
.
zero
fun
(
_
:
Nat
)
=>
let
b
:
Nat
:=
Nat
.
zero
(
fun
(
_
:
a
=
b
)
=>
0
)
(
Eq
.
refl a
)