⊦ 0 ≤ i → sqrt(i) ^2 ≤ i ∧ i < sqrt(i) +1 ^2
0 ≤ i → sqrt(i) ^2 ≤ i ∧ i < sqrt(i) +1 ^2, j ^2 ≤ i, i < (j + 1)^2, j ^2 < (j + 1)^2, 0 ≤ j ⊦ sqrt(i) = j
Used terms: i