exact Int.dvd_mul_cancel_prime' this' hkdvdright Int.prime_two hkdvdleft
case H.ha
u v : ℤ
huvcoprime : IsCoprime u v
this' : ¬2 ∣ u + 3 * v
notdvd_3_3 : ¬3 ∣ u + 3 * v
k : ℤ
hkprime : Prime k
hkdvdleft : k ∣ 2 * u
hkdvdright : k ∣ u + 3 * v
⊢ k ∣ u
no goals