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Proof step 2 from proof mod-pot-shift-pos (previous step)

0 < j, 0 ≤ i0 ⊦ (i % j) ^ i0 % j = i ^ i0 % j

User applied rule cut formula

And obtained the following new goals

Proof step 3:
0 < j, 0 ≤ i0 ⊦ i0 = 0, (i % j) ^ i0 % j = i ^ i0 % j

Rule argument

fma: i0 = 0

Additional information

Used simplifier rules: Pot-zero: ⊦ j ^ 0 = 1; Used formulas: i0 = 0