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 Mathematics , 1995, Abstract: We study the dynamics of the tangent family z -> lambda tan z for lambda complex and give a complete classification of their stable behavior. We also characterize the the hyperbolic components and give a combinatorial description their deployment in the parameter plane.
 HoSeong La Physics , 1993, Abstract: In the standard model with two Higgs doublets it is shown that the existence of the electroweak Z-string in general requires the same characteristic length for the two Higgs fields as well as a specific ratio of the two Higgs vacuum expectation values, i.e. $\tan\beta$. This ratio can be determined in terms of the couplings in the Higgs potential. Some remarks on the supersymmetric case are given. \noindent (Talk presented at SUSY '93, March 29-April 1st, Northeastern University, Boston, MA 02115, USA.)
 Ernest Ma Physics , 1993, DOI: 10.1103/PhysRevD.49.1663 Abstract: In the minimal supersymmetric standard model, the Higgs sector has two unknown parameters, usually taken to be $\tan \beta \equiv v_2/v_1$ and $m_A$, the mass of its one physical pseudoscalar particle. By minimizing the minimum of the Higgs potential along a certain direction in parameter space, it is shown that $m_A = M_Z$ + radiative correction, and if one further plausible assumption is made, $\tan \beta > \sqrt 3$.