Abstract
It is shown, by use of the O(6) limit of the interacting-boson model, that the \ensuremath{\gamma}-unstable state can be generated from the rigid triaxial intrinsic state with \ensuremath{\gamma}=30\ifmmode^\circ\else\textdegree\fi{}. This equivalence between the two descriptions holds under a certain condition on the number of bosons, which is satisfied in realistic cases. The \ensuremath{\beta}-\ensuremath{\gamma} deformation potential calculated from this triaxial intrinsic state has a minimum also at \ensuremath{\gamma}=30\ifmmode^\circ\else\textdegree\fi{}, though quite shallow. The validity of the potential and the triaxial intrinsic state, which has been questioned because of the shallow minimum, is thus confirmed.
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