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    Modular transformation and twist between trigonometric limits of sl(n)sl(n) elliptic R-matrix

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    We study the modular transformation of Zn{\bf Z}_n-symmetric elliptic R-matrix and construct the twist between the trigonometric degeneracy of the elliptic R-matrix.Comment: 8 pages, latex, reference revise

    Effective SU(2)_L x U(1) theory and the Higgs boson mass

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    We assume the stability of vacuum under radiative corrections in the context of the standard electroweak theory. We find that this theory behaves as a good effective model already at cut off energy scales as low as 0.7 TeV. This stability criterion allows to predict m_H= 318 +- 13 GeV for the Higgs boson mass.Comment: Latex, 5 pages, 1 Postscript figure include
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