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The condensate has a spatially nonuniform equilibrium density profile $\\rho(z,r)$ due to an external axisymmetric potential. It is assumed that $z_*=0$, $r_*=1$ is a maximum point for function $r\\rho(z,r)$, with $\\delta (r\\rho)\\approx-(\\alpha-\\epsilon) z^2/2 -(\\alpha+\\epsilon) (\\delta r)^2/2$ at small $z$ and $\\delta r$. 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