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Proof step 5 from proof two-ex (previous step)

2 * (((j1 - j2) / 2)^2 + ((j1 + j2) / 2)^2) = j1 ^2 + j2 ^2 ⊦ ∃ i1, i2. ((j1 - j2) / 2)^2 + ((j1 + j2) / 2)^2 = i1 ^2 + i2 ^2

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

pos: right 1 terms: (j1 - j2) / 2, (j1 + j2) / 2

Additional information

Used terms: (j1 - j2) / 2, (j1 + j2) / 2