Abstract
A global $\mathrm{U}{(1)}_{A}$ symmetry is automatically embedded in the SU(11) model of Georgi which is the only known flavor unification with exactly 45 chiral fermions. The Higgs-field representations are 165's, 462's, and an adjoint. The $\mathrm{U}{(1)}_{A}$ symmetry locates the ordinary fermions. Spontaneous breaking of $\mathrm{U}{(1)}_{A}$ results in an invisible axion and Majorana masses of neutrinos of order \ensuremath{\lesssim}0.1-1 eV.
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