exact Nat.div_le_div_right (Nat.mul_le_mul_right _ (Nat.le_succ _))
case hE'.refine_2
n d : ℕ
inst✝ : NeZero d
w : Weight n d
hE : E (trunc w) = E w
k : Fin (Nat.succ n)
hk : w k = 0
w' : Weight n d := Function.update (trunc w) k 1
j : Fin (Nat.succ n)
hj : E w < w j
hsum' : Weight.sum w' = Weight.sum (trunc w) + 1
⊢ Weight.sum (trunc w) * d / (n + 1) ≤ (Weight.sum (trunc w) + 1) * d / (n + 1)
no goals