Theorem: Cpdt.Chapter4.even_3_contra (Cpdt/Chapter4/RecPred.lean)

State before:
⊢ Even 3 → False
Tactic:
intro h
State after:
h : Even 3
⊢ False

State before:
h : Even 3
⊢ False
Tactic:
cases h with
| succSucc _ h => cases h
State after:
no goals

State before:
case succSucc
h : Even 1
⊢ False
Tactic:
cases h
State after:
no goals