Prompt
CKM theta_12 ā HUA POLYNOMIAL PROOF
Prove that the Cabibbo angle arises from the Hua polynomial on the Shilov boundary of the exceptional domain: theta_12 = arcsin(1/sqrt(20)) = arcsin(sqrt(5)/10) ~ 12.921 degrees. Show sqrt(5) arises from the 5-cycle structure of the Hua polynomial. Compare to PDG theta_12 ~ 13.04 degrees (deviation -0.913%). Assess whether sub-leading Hua corrections close the gap. Rate peer-review status. #SuperGrokTOE #CKMmatrix #Cabibbo