3f548edcd7
When updating Std, be careful that not every lemma has been upstreamed, so we need to be careful to only delete things that have already been declared.
6 lines
370 B
Text
6 lines
370 B
Text
variable (n v₁ v₂) (hv₁: v₁ < n + 1) (hv₂: v₂ < n + 1)
|
||
theorem foo (_: ¬ Fin.mk v₂ hv₂ = Fin.mk v₁ hv₁ ): True := trivial
|
||
set_option trace.Meta.Tactic.simp true in
|
||
example (hv: v₁ < v₂) : True := foo n v₁ v₂ ‹_› ‹_› (by simp (config := { decide := true }) only [hv, Fin.mk.injEq, Nat.ne_of_gt, Nat.lt_succ_iff])
|
||
|
||
#check Fin.mk.injEq
|