27 lines
648 B
Text
27 lines
648 B
Text
⊢ 2 + 1 = 3
|
|
change_tac.lean:10:2: error: tactic.change failed, given type
|
|
2 + 2 = 3
|
|
is not definitionally equal to
|
|
1 + 2 = 3
|
|
state:
|
|
⊢ 1 + 2 = 3
|
|
h : 2 + 1 = 3
|
|
⊢ 2 + 2 = 4
|
|
change_tac.lean:22:2: error: change-at does not support multiple locations
|
|
state:
|
|
h : 1 + 2 = 3
|
|
⊢ 2 + 2 = 4
|
|
change_tac.lean:27:2: error: change-at does not support multiple locations
|
|
state:
|
|
h : 1 + 2 = 3
|
|
⊢ 2 + 2 = 4
|
|
h : 2 + 1 = 3
|
|
⊢ 1 + 2 = 3
|
|
h : 3 = 3 + 1
|
|
⊢ 3 = 3
|
|
change_tac.lean:46:2: error: tactic.change failed, given type
|
|
4 = 4 + 1 → 1 + 2 = 3
|
|
is not definitionally equal to
|
|
1 + 2 = 1 + 2 + 1 → 1 + 2 = 3
|
|
state:
|
|
⊢ 1 + 2 = 1 + 2 + 1 → 1 + 2 = 3
|