There is a type in the second and the third lines of the proof of theorem 2.4. 
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ykaya932 commentedon Apr 10, 2021
In the second line, it should be [...*((b_1)^2 + (b_2)^2 + (b_3)^2) - ....]
And in the third line, it should be [... - (a.b)^2]
kayacanv commentedon Jan 26, 2023
Hi @ykaya932 ,
I saw you self-assigned this, Is there any update on this?
Thanks