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Proof step 9 from proof bits2bytes-len-01 (previous step)

n * 8 - 1 = (n - 1) * 8 + 7, # bits = n * 8 ⊦ bits = [], (n * 8 - 1) / 8 + 1 = n

User applied rule insert equation

And closed the goal!

Rule argument

pos: left 1 flags: discard

Additional information

Used simplifier rules: ⊦ m + n = n + m;%n ≠ 0 ⊦ (n0 + m * n) / n = n0 / n + m;% ⊦ 0 + m = m;% ⊦ (m + n0) + n1 = m + n0 + n1;% ⊦ m0 * m * n = (m0 * m) * n;% ⊦ m * n = n * m;% ⊦ # bits = 0 ↔ bits = [];% ⊦ m < 1 ↔ m = 0;% ⊦ ¬ m ≤ n ↔ n < m;%n ≤ m ⊦ (m - n) + n0 = n1 ↔ m + n0 = n + n1;