In extended Higgs models, a discrete symmetry is needed in the quark sector to avoid tree-level flavor-changing neutral currents. However, this not necessary case lepton sector. We consider model which one couples quarks and three others couple electron, muon tau, respectively. This four-doublet presented with full scalar potential gauge Yukawa couplings. The constraints from boundedness, pertu...

We present the exact realization of extended Snyder model. Using similarity transformations, we construct realizations original and models. Finally, new $\kappa$-deformed