Theorem: LoVe.Even_18_and_Even_20 (LoVe/Lectures/LoVe08_Metaprogramming_Demo.lean)

State before:
α : Type
a : α
⊢ Even 18 ∧ Even 20
Tactic:
apply And.intro
State after:
case left
α : Type
a : α
⊢ Even 18

case right
α : Type
a : α
⊢ Even 20

State before:
case left
α : Type
a : α
⊢ Even 18

case right
α : Type
a : α
⊢ Even 20
Tactic:
intro_and_even
State after:
no goals