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github.com
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leanprover
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lean4
/
refs/heads/upstream/Array.mapIdx
/
.
/
tests
/
lean
/
unfold1.lean.expected.out
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edit
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unfold1
.
lean
:
22
:
4
-
22
:
8
:
error
:
simp made
no
progress
case
succ
x
:
Nat
ih
:
isEven
(
2
*
x
)
=
true
⊢
(
match
2
*
(
x
+
1
)
with
|
0
=>
true
|
n
.
succ
=>
isOdd n
)
=
true
case
succ
x
:
Nat
ih
:
isEven
(
2
*
x
)
=
true
⊢
isEven
(
2
*
x
)
=
true
