All Questions
Tagged with backward-proof inductive-type
1
question
1
vote
1
answer
99
views
How to apply constructor injectivity in the goal
Suppose I have a goal
Goal forall m n, S m = S n -> m = n.
intros m n H.
1 goal
m, n : nat
H : S m = S n
============================
m = n
I know ...