Typo/error in Solution of Challenge Exercise 1.3.3

I believe that there is a typo/error in the Solution of Challenge Exercise 1.3.3.
In the final step, with the substitutions, the 1/2 factor of \beta, \alpha and \gamma should not be there.
In the desired form of the matrix there is already a factor 1/2, so 1/2 is not needed.
Thus the substitution should be simply

\phi = \beta -\alpha -\gamma, \\ \omega = \gamma -\alpha
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Hi @filippotramonto , welcome to the Forum!

I think you’re right. Thank you for making us aware of this, we’ll make sure to fix it.

Thank you for helping us make the Codebook better ! :raised_hands: