| i |%| j = i0 |%| j, i0 = j * j0 + i0 |%| j, 0 < j ⊦ j = 0, ∃ i1. i = j * i1 + i0 |
⊦ j ≠ 0 → (∃ j0. i = j * j0 + i |%| j)
j ≠ 0 → (∃ j0. i = j * j0 + i |%| j), i |%| j = i0 |%| j, i0 = j * j0 + i0 |%| j, 0 < j ⊦ j = 0, ∃ i1. i = j * i1 + i0
Used terms: j, i